Hamworthy ST6A Super Trident Sewage Treatment Unit …docshare04.docshare.tips/files/25821/258218487.pdf · Hamworthy ST6A Super Trident Sewage Treatment Unit to IMO MEPC 2(VI) GO

HamworthyST6A

Super Trident Sewage Treatment Unitto IMO MEPC 2(VI)

GO 94708 & 94709Hulls 5299 & 5300

Installation, Operating and Maintenance Manual

HAMWORTHY WASTEWATER SYSTEMS LIMITED

Fleets Corner, Poole, Dorset, BH17 0JT, EnglandTelephone: +44 (0)1202 662600Email: [email protected]

Website: www.hamworthy.comFacsimile: Spares and Sales +44 (0)1202 668793; Service +44 (0)1202 662622

Offices, Associate Companies and Agents throughout the world

WARNING

1. Health and Safety Act Compliance. Before working on this equipment personnel should bemade aware of, and ensure compliance with, the Health and Safety Regulations appropriate tothis class of work.

2. Work must only be carried out by suitably qualified and competent persons.

3. Before lifting, installing and operating the unit, the instructions detailed below, and also theaccompanying manual must be read.

4. Ensure that all equipment used for lifting the unit is adequate for the weight. The weight isnormally stencilled on the unit and/or stamped on the machine nameplate.

5. The handling points are indicated on the unit and these must be used. The hooks of slingsmust not be fitted directly to lifting eyebolts or lugs, shackles must be used.

6. Before running the unit for the first time, the installation must be thoroughly checked and theprocedure detailed in Section 4 of this manual under the heading “Preparation for InitialOperation” referred to.

7. The unit must not be run unless all protective guards supplied with the equipment are inposition.

8. Before proceeding with maintenance on the unit, or making adjustments to its connections andfittings, it must be stopped and isolated electrically and mechanically and visible warning noticesdisplayed.

9. Ensure safety procedures for hazardous gases or oxygen depletion are carried out beforeopening the tanks.

10. Before commencing repair or overhaul a preliminary check of available spares must be made,e.g. replacement set of joints or jointing material.

11. Pumps handle various liquids, sometimes not those for which the pump was initially supplied.Know the properties of the liquids that have been pumped, and the actions necessary to makehandling safe and in the event of an emergency.

12. Before handling sodium hypochlorite refer to instructions in Section 4.

13. The equipment should not be installed in an explosive atmosphere.

14. This equipment is subject to international, European, and national regulations and must be usedaccordingly.

ISSUE 1 2 3 4

Hamworthy Water Systems LimitedAcknowledgement Of Order

6 October, 2008 GO 94708 & 94709 -01 QUOTE: E64296

CUSTOMER: 1DAE014DAEWOO SHIPBUILDING & MARINEENGINEERING CO LTD1, AJU-DONG, KOJE-CITYKYOUNGNAM,KOREA 656714South Korea

CONSIGN TO:DAEWOO SHIPBUILDING & MARINEENGINEERING CO LTD1, AJU-DONG, KOJE-CITYKYOUNGNAM,KOREA 656714South Korea

Customer’s Order No: 4000370813, dated 21st February 2007

Destination: Hull 5299 & 5300Owner: SCI

SUPER TRIDENT BIOLOGICAL SEWAGE TREATMENT PLANT - IMO/MED APPROVED

One - ST6A Super Trident Sewage Treatment Plant suitable for a total estimated daily sewage flow of 9360litres having a maximum B.O.D. load of 6.000 kg per day. IMO/MED certified and accepted by USCGfor use on non-US flag vessels in US waters.

Grey water from low level sinks, showers, etc., can be connected to the final collection tank to enableoverboard discharge. (8800 L/Day Max).

Electrical Supply: 440 volts, 3 phase, 60 Hz. Total Operating Electrical Load: 6.2 kW

The following equipment is supplied with the Sewage Treatment Plant offered:

Two Rotary Vane Air Blower, Electric Motor Driven to aerate and mix through internal fine bubble diffusers.

Two Hamworthy B50x50HC medium head, Effluent Discharge Pump, Electric Motor Driven.• Capacity: 8 m³/hr• Total Head: 25 m

• One pressure gauge with brass body and 3 way gauge valve for discharge pump (supplied loose)(kg/cm2)

• One pressure gauge with brass body and 3 way gauge valve fitted to air distribution manifold ( kg/cm2)• Full set of mating flanges

CONNECTION SIZES:

Sewage Inlet: 50A/ 150A Discharge Pipe-work: 50AAir Vent: 65A Hospital Grey Water: 50AFlush Water Inlet: 40A Grey Water: 150AOverflow: 65ADistance between the centre of the black water and hospital inlet to be 300 mm

ISSUE 1 2 3 4







MATERIALS:The tank construction is a welded mild steel fabrication fitted with the required pump, compressor and controlpanel piped and cabled complete.

Pump casing – cast iron (plastic coated) and impeller - BronzeMechanical SealElectric Motor - totally enclosed fan cooled [IP55], squirrel cage, induction motor, continuously rated toBS5000 Part 99 and relevant parts of BS 4999, with Class 'F' insulation suitable for direct on line start.

• 3 level float switch for pump control - polyester resin/polypropylene – Test lever type• Tank Mounted Calcium Hypochlorite tablet dosing chlorinator - polypropylene/PVC• Effluent Quality Test Kit for checking residual chlorine level, nominally 5 ppm• 10 Kg drum of hypochlorite tablets for use in chlorinator unit.

CONTROL PANEL:Auto-Control Panel with IP55 enclosure mounted on unit with contactors for air blower and discharge pump,running pilot lamps, 220 volt control circuit transformer, with primary circuit breaker protection control circuitfuses and main motor protection circuit breakers. U, V & W terminals to be GREEN, YELLOW & BROWNrespectively. General abnormal alarm complete with volt free contacts to be provided. Door stay to befitted. Cable glands to be provided for incoming electrical supply and alarm cables :

Lamps: Power available (white), Discharge pump running (green), Blower running (green)Remote connections: Blower running, discharge pump running, emergency stop

INTERNAL TANK:- Corrosion protection shotblast to SA 2.5 and a minimum of two coats of coal tar epoxy paint to give a minimumof 250 dry film thickness.

PAINT FINISH:-1 - Tank External – Hamworthy standard enamel – final colour Munsell 7.5BG 7/22 - Panel Munsell 7.5BG 7/23 - Blowers Manufacturer's standard4 - Pumps Cast iron casing – plastic coated Drive Motor - Munsell 7.5BG 7/2 Special:• Tank to be provided with access ladder to tank top.

ISSUE 1 2 3 4







• Hospital inlet• Nameplates for each valve to be fitted – material : stainless steel• Suitable nameplates should be fitted for all electrical equipment – material : stainless steel• The internal circuit diagram is to be enclosed inside the control panel• External cables to be “low smoke halogen free” type• ALL GAUGES TO BE SUPPLIED COMPLETE WITH COPIES OF THEIR CALIBRATION CERTIFICATE• Cable tray to be added for yards cable work

Carriage: FOB Shanghai PortInspection Factory Acceptance TestCertification:Depart of Transport, MED & Works Test Certificates

(IMO & MED approval labels fitted to unit)Terms: 100% against Irrevocable Letter of Credit raised 30 days prior to despatchHandbook: PCH1544 + PCH1557

ISSUE 1 2 3 4







ST6A Recommended Spares

One set of spares packed in a steel box comprising:-

PUMP2 Jacking screws, 1 peel off shim, 1 impeller screw, 1 'O' ring (impeller), 1 'O' ring (casing), 1 tab washer, 1mechanical seal, 1 set motor bearings

CONTROL PANEL1 Triple pole contactor, 1 auxiliary contact, 1 pilot lamp bulb, 2 fuses-5 amp, 2 fuses-2 amp.

BLOWER6 Carbon Blades, 1 Filter Cartridge (Paper), 1 Filter Cartridge (Metal), 2 Ball Bearings, 1 Tolerance Ring, 4Spacers.

Tagplate to be provided as follows:

SERIAL NO. 94708HULL NO. 5299RELATED EQUIPMENT SEWAGE TREATMENT PLANTSER. NO. BY MAKER 94708-01

Packing list to be provided in two copies inside vinyl cover and included inside steel box.

Carriage: FOB Shanghai PortTerms: Irrevocable Letter Of Credit

ISSUE 1 2 3 4


6 October, 2008 GO 94708 & 94709 QUOTE: E64296





GENERAL

The equipment on this contract will be of standard commercial design, with no special materials, material tests,fittings, connections or components being incorporated except as detailed in this Specification.

The contract includes for the supply only of the specified items. Installation, interconnecting pipework includingvalves and other accessories, electrical wiring, etc. will be the responsibility of the Customer.

The equipment on this contract will be supplied in accordance with Daewoo General Terms and Conditions forPurchasing with amendments as noted in our acknowledgement for Hull 2210 / PO No. AF1B1289 (HKSE GOref 91603).

GUARANTEE

To cover claims notified within 24 months of the date of commissioning the plant (or of handover of the vessel tothe owners) or 30 months from the date of despatch from our Works, whichever is the earlier.

This guarantee applies to Hamworthy manufactured items. We will endeavour to obtain the same terms from oursuppliers in respect of bought out items, but where they are not prepared to meet our request, the guaranteecovering such bought out components will be limited to that which we are able to obtain from the supplier.

PAINTING

Items will be supplied to Manufacturer's Standard Grade and finish painted to Manufacturer's standardSpecification.

PACKAGING AND CONSIGNING

The goods on this contract will be securely packaged to export standard suitable for surface freight overseas anddelivered FOB Shanghai Port. NB. Control panel to be packed with silica gel and covered with vinyl prior topacking to prevent moisture.

Page 1

CONTENTS

SECTION 1 - TECHNICAL DATA ........................................................................................................ 1-11.1 GENERAL.............................................................................................................................. 1-11.2 PEAK LOADING CONSIDERATIONS – R61638 .................................................................. 1-2

SECTION 2 - DESCRIPTION............................................................................................................... 2-12.1 INTRODUCTION.................................................................................................................... 2-12.2 GENERAL.............................................................................................................................. 2-22.3 DETAILED DESCRIPTION.................................................................................................... 2-2

2.3.1 Aeration Compartment.................................................................................................... 2-22.3.2 Settling Compartment ..................................................................................................... 2-22.3.3 Chlorine Contact Compartment ...................................................................................... 2-22.3.4 Chlorinator ...................................................................................................................... 2-3

2.4 Discharge Pump..................................................................................................................... 2-32.5 Air Compressor ...................................................................................................................... 2-32.6 Electrical Controls .................................................................................................................. 2-3

2.6.1 General ........................................................................................................................... 2-32.6.2 Float Switches ................................................................................................................ 2-32.6.3 Operation ........................................................................................................................ 2-32.6.4 Remote Emergency Stop................................................................................................ 2-4

SECTION 3 - INSTALLATION.............................................................................................................. 3-13.1 GENERAL DATA ................................................................................................................... 3-13.2 INSTALLATION INSTRUCTIONS – T0504007 ..................................................................... 3-23.3 RECOMMENDATIONS ON VENT SYSTEM DESIGN – R58386 ......................................... 3-73.4 FITTING INSTRUCTIONS FOR ITEMS PACKED SEPARATELY FOR SAFE TRANSIT .. 3-103.5 COMPARTMENT VENTILATION ........................................................................................ 3-10

SECTION 4 - OPERATION .................................................................................................................. 4-14.1 HEALTH AND SAFETY INFORMATION............................................................................... 4-14.2 PREPARATION OF UNIT FOR INITIAL OPERATION.......................................................... 4-34.3 DETERMINATION OF RESIDUAL CHLORINE CONTENT.................................................. 4-3

4.3.1 General ........................................................................................................................... 4-34.3.2 Sampling Instructions ..................................................................................................... 4-4

4.4 Disinfectant Cleaners............................................................................................................. 4-44.4.1 Approved Biological Toilet Cleaners............................................................................... 4-44.4.2 Approved Descaler ......................................................................................................... 4-4

4.5 DESLUDGING TO AN INCINERATOR ................................................................................. 4-44.5.1 General ........................................................................................................................... 4-44.5.2 Using a Sludge Pump ..................................................................................................... 4-54.5.3 Using the Super Trident Discharge Pump ...................................................................... 4-54.5.4 Key to Symbols shown on Schematic Drawing A19170................................................. 4-6

SECTION 5 - MAINTENANCE ............................................................................................................. 5-15.1 GENERAL.............................................................................................................................. 5-15.2 MAINTENANCE SCHEDULE ................................................................................................ 5-2

5.2.1 Weekly ............................................................................................................................ 5-25.2.2 Monthly ........................................................................................................................... 5-25.2.3 6 Monthly ........................................................................................................................ 5-25.2.4 Annually .......................................................................................................................... 5-2

5.3 CLEANING THE CHLORINATOR ......................................................................................... 5-35.4 DRAIN AND CLEAN UNIT..................................................................................................... 5-35.5 AIR DIFFUSER ASSEMBLIES .............................................................................................. 5-4

5.5.1 General ........................................................................................................................... 5-45.5.2 Element Replacement .................................................................................................... 5-4

5.6 RECOMMENDED SPARES LIST.......................................................................................... 5-5SECTION 6 - KEY COMPONENTS ..................................................................................................... 6-1

6.1 DISCHARGE PUMP .............................................................................................................. 6-16.1.1 TECHNICAL DATA......................................................................................................... 6-16.1.2 DESCRIPTION ............................................................................................................... 6-26.1.3 INSTALLATION .............................................................................................................. 6-26.1.4 OPERATION................................................................................................................... 6-36.1.5 MAINTENANCE.............................................................................................................. 6-56.1.6 DRAWINGS .................................................................................................................. 6-10

Page 2

6.2 COMPRESSOR ..................................................................................................................... 6-1SECTION 7 - DRAWINGS AND SPECIFICATIONS.......................................................................... 6-10

7.1 Process and Instrument Diagram ........................................................................................ 6-117.2 General Arrangements......................................................................................................... 6-127.3 Sectional Arrangements....................................................................................................... 6-137.4 Electrical Drawings .............................................................................................................. 6-19

FIGURES

Figure 2.1-1 Schematic Diagram of Sewage Treatment Unit.............................................................. 2-1Figure 3.3-1 Discharge Pump Installation ......................................................................................... 3-10Figure 4.5-1 Schematic System Layout Sewage Treatment Unit / Incinerator ................................... 4-7Figure 6.1-1Impeller Shimming ............................................................................................................ 6-7

TABLESTable 5.1-1 Trouble Shooting Guide ................................................................................................... 5-1Table 5.6-1 Recommended List of Spares.......................................................................................... 5-5Table 6.1-1 Maintenance Schedule...................................................................................................... 6-9TABLE 6.1-2 Fault Finding Chart ........................................................................................................ 6-9Table 7.3-1List of Parts for Drawing D7937 ....................................................................................... 6-16

Detailed Contents of Section 7

Reference Number DetailsSection 7.1: Process and Instrument Diagram

D8462 Process and Instrument Diagram (2 pumps)

Section 7.2: General ArrangementsD7936 - 376 ST6A General Arrangement DrawingA21951 Guage GA

Section 7.3: Sectional ArrangementsD7937 ST2A-ST6A Sectional Arrangement

Section 7.4: Electrical DrawingsES10292 Installation Wiring Diagram (2 pump, 2 compressor)ES10291 Circuit Diagram (2 pump, 2 compressor)ES10291-1 Circuit Diagram (2 pump, 2 compressor) Key Sheet

Page 3

Spare Parts and Service

Spare Parts can be ordered direct from the following address:Hamworthy Wastewater Systems Ltd. Telephone: +44 (0)1202 662600Fleets Corner Facsimile: +44 (0)1202 668793Poole, Dorset Email: [email protected] 0JT, England

or via any Hamworthy office or agency throughout the world.

When ordering spare parts, the following information is required to ensure that correct parts aresupplied:Type and serial number of machine: Obtained from machine nameplateItem Number and full description of part required: Obtained from details in this publication

Technical Service and Advice:Technical service and advice can be obtained during normal working hours from the above address,on the following contact numbers

Telephone: +44 (0)1202 662663Facsimile: +44 (0)1202 662622Email: [email protected]

or via any Hamworthy office or agency throughout the world, listed below.

Outside normal working hours a 24 hour emergency facility is available. Initial telephone contactnumber is England +44 (0)1202 662663.

Hamworthy Offices and Agencies

AUSTRALIA

RFD AUSTRALIA PTY LTD,RFD TECHNOLOGIES,UNIT A, 75 ST HILLIERS ROADAUBURN, NSW 2144AUSTRALIA

TEL: +61 2 9643 8000FAX: +61 2 9643 8011EMAIL: [email protected]

BENELUXHAMWORTHY BVAPLONIASTRAAT 33NL-3084 CC , ROTTERDAMNETHERLANDS

TEL: 00 31 10 4624777FAX: 00 31 10 4159046EMAIL: [email protected]

BRAZILTRIDENTE BRAZILRUA VISCONDE INHAUMA134 - GR 1513, RIO DE JANEIRORJ – BRAZIL 20091-000, BRAZIL

TEL: 00 55 21 2233 1489FAX: 00 55 21 2516 7543EMAIL: [email protected]

BULGARIAMARTIMEX-MARINE TRADING SROCERVENEJ ARMADY 103601 MARTIN, SLOVAKIA


CANADAMARINE & OFFSHORE CANADA113 CUSHMAN ROADUNIT 60, ST CATHARINESONTARIO, CANADA


CHILELANZ Y CIA LTDACALLE DR M BARROS BORGONO 233CASILLA 16389, SANTIAGOCHILE


CHINA

HAMWORTHY LTD. SHANGHAI REP. OFFICEROOM 7D YI DIAN PLAZANO 746 ZHAO JIA BANG ROAD,SHANGHAI 200 030CHINA


CROATIAEUREKA INTERNATIONAL D.O.OKASTELANOA 18HR-21000 SPLIT, CROATIA


CYPRUSMIE SERVICES LTDTHE HAWK BUILDING,124 GLADSTONE STREET,3032, LIMASSOL, CYPRUS,


Continued...

Page 4

Hamworthy Offices and Agencies, continued

CZECH REP.MARTIMEX-MARINE TRADING SROCERVENEJ ARMADY 103601 MARTIN, SLOVAKIA


EGYPTINTERNATIONAL MARINE CENTER6 MAHMOUD AZMY STREET (21131)PO BOX 95 (21321), IBRAHIMIEHALEXANDRIA, EGYPT


FRANCEETABLISSEMENTS TIANO S.A2 BIS, RUE DE LA BAUMEFR-75008 PARIS, FRANCE


GERMANYWILHELM RUMP KGBUCHHEISTERSTRABE 6DE-20457, HAMBURGGERMANY


GREECEMARINE & INDUSTRIAL SYSTEMS LTD4-6 EFPLIAS STREETGR 185 37 PIRAEUS,GREECE


INDIAHAMWORTHY (INDIA) PVT. LTD.C-155 MITTAL COURTNARIMAN POINT, MUMBAI 400 021INDIA,

TEL: 00 91 22 22843429/22040801FAX: 00 91 22 22872394EMAIL: [email protected]

ISLAMICREPUBLIC OFIRAN

IRAN ZOOBIN CONO. 750 GOZAR FARVARDIN 10TH STREET, SOUTHPIROOZAN AVE, HORMOZAN AVESHAHRAK GHODS, TEHRAN 14666, IRAN

TEL: 00 98 21 8590002/3FAX: 00 98 21 8590005EMAIL: [email protected]

ISRAELB. SOFER & CO LTDPO BOX 221AVICHAIL 42910, ISRAEL

TEL: 00 972 9 8822319FAX: 00 972 9 8625211

ITALYSIRN SRLVIA DEL LAZZARETTO VECCHIO 9IT-34123 TRIESTE, ITALY


ITALYSIRN SRLVIA CASAREGIS 22/1IT-16129 GENOVA, ITALY


JAPANFESCO JAPAN LTD3F SHINEI BUILDING 132-CHOME, 4-BAN SAKEMACHI-DOURI, CHUO-KUKOBE 652-0831, JAPAN


KOREA

HAMWORTHY LTD8TH FLOOR YOOSUNG PLAZA BUILDING,#655-6, WOO-DONG,HAEUNDAE-GUBUSAN, KOREA (612-020)


KUWAITTHE TRADING & IND. EQUIPMENT CO[T.I.E.C.O]PO BOX 2159, 13022 SAFATKUWAIT C.R. 13104

TEL: 00 965 4819188FAX: 00 965 4810387EMAIL: [email protected]

MALTATHOMAS C SMITH & CO LTD12 ST CHRISTOPHER STREETVALETTA, VLT 06 MALTA

TEL: 00 356 245071FAX: 00 356 242056EMAIL: [email protected]

NEW ZEALANDCABA [NEW ZEALAND] LTD37 CLYDE STREETWHANGAREI, NEW ZEALAND

TEL: 00 64 9 4383661FAX: 00 64 9 4300854

NORWAYHAMWORTHY PUMP SYSTEMS ASJOSEPH KELLERS VEI 20,TRANBY, P O BOX 83NO-3401 LIER, NORWAY


OMANTRANS-OCEANIC TRADING ESTPO BOX 1892POSTAL CODE 112, RUWISULTANATE OF OMAN,

TEL: 00 968 798503/787912FAX: 00 968 702981EMAIL: [email protected]

PAKISTANUNITED TRADERSHAROON CHAMBERSALTAF HUSSAIN ROAD, KARACHI 74000PAKISTAN,

TEL: 00 92 21 2414916FAX: 00 92 21 2416862

Continued...

Page 5

Hamworthy Offices and Agencies, continued

POLANDROMAC LTDUL CIOLKOWSKIEGO 7A/25PL 80-463, GDANSKPOLAND,


PORTUGAL

GELLWEILER SOC DE EQUIP. MARTIOMOS EINDUSTRIALSTRAVESSA DO ALECRIM 3-2BOX 2005, 1101 LISBONPORTUGAL,

TEL: 00 351 21 3420021FAX: 00 351 21 3420026

QATARAL-AHED TRADING & CONTRACTING COPO BOX 3266DOHA, QATAR

TEL: 00 974 4414022/3/4FAX: 00 974 4414021EMAIL: [email protected]

ROMANIATOTAL TRADING SRL118 DOMNEASCA STREET6200 GALATZ, ROMANIA


RUSSIATRANSAS MARINE LTD (EURASIA)11, KRUSTALNAYA STREETST PETERSBURG, 193019RUSSIA,

TEL: 00 7 812 329 2340FAX: 00 7 812 5679455EMAIL: [email protected]

SERBIAMARTIMEX-MARINE TRADING SROCERVENEJ ARMADY 103601 MARTIN, SLOVAKIA


SINGAPOREHAMWORTHY PTE LTD15 BENOI CRESCENTSINGAPORE 629978,


SLOVAKIAMARTIMEX-MARINE TRADING SROCERVENEJ ARMADY 103601 MARTIN, SLOVAKIA


SOUTH AFRICAHAMWORTHY ENGINEERING AFRICA (PTY) LTDPO BOX 50435RANDBURG, 2125GAUTENG, SOUTH AFRICA


SPAINEQUIPOS NORNAVAL SANUNEZ DE BALBOA 15-3°ES-28001, MADRIDSPAIN


TAIWANMING TZONG HARNG TRADING CO LTD3F-3 NO 90 CHUNG SHAN HENG ROADKAOSHIUNG 80015, TAIWANR.O.C


UAE DUBAIAQUATECH INTERNATIONAL LLCPO BOX 73799,DUBAI,U.A.E


UKHAMWORTHY LTDFLEETS CORNERPOOLE, DORSETENGLAND

TEL: +44 (0) 1202 662600FAX: +44 (0) 1202 662622EMAIL: [email protected]

USAHAMWORTHY INC1011 HIGHWAY 6 SOUTHSUITE 208, HOUSTONTX 77077, USA


USAHAMWORTHY INC1418 EDWARDS AVENUESUITE B, NEW ORLEANSLOUISIANA 70123, USA

TEL: 00 1 504 7345525FAX: 00 1 504 7345716

V17 0804

Page 6

CAUTION

NOTICE TO ALL USERS OF HAMWORTHY EQUIPMENT

SPARE PARTS

Please ensure that only original spare parts are used.

Machines have failed as a direct result of using non-original spare parts

Warranty claims may be invalidated if non-original parts are used.

The use of non-original parts can be dangerous.

Statutory rights are not affected.

SECTION 1 – TECHNICAL DATA

Page 1-1

SECTION 1 - TECHNICAL DATA

1.1 GENERAL

Electrical Power Supply

ST6A 440V, 3 phase, 60 HzControl Voltage 220V A.C.

Discharge Pump Motor Ratings

Close coupled B50x50 High Head (25m) 60Hz 5.7 kW

Compressor Motor Ratings (50/60Hz)

ST6A 1.50 / 1.80 kW

Discharge Pump Duty

Close coupled B50x50 High Head (25m) 60Hz 8 m³/hr at 25m head

Pump Motor Speed

60 Hz (2 pole) 3480 rev/min.

Compressor Duty

ST6A 0.5 bar - 41 m³/hr

High Level Alarm

High Level Alarm Volt free normally closed 500W

Vent System Back Pressure

Vent System Back Pressure 15mm w.g. (max.)

Temperature and Humidity Data

Operating Ambient Temperature 0° (min) to 45°C. (max)Operating Relative Humidity Maximum 95%


Page 1-2

1.2 PEAK LOADING CONSIDERATIONS – R61638


Page 1-3

SECTION 2 – DESCRIPTION

Page 2-1

SECTION 2 - DESCRIPTION

2.1 INTRODUCTION

The Hamworthy Super Trident Sewage Treatment unit is a self contained system for the treatment ofsewage from ships or rigs before it is discharged overboard and so prevent the pollution of harbourand coastal waters and inland waterways. The system uses the aerobic principle of sewage digestion,coupled with treatment of the final effluent, and is generally accepted as the most compact, efficientand flexible system for use on board ship. The Super Trident will operate satisfactorily on salt, freshor brackish flushing water.

The system is ideal for ship installation as, if necessary, a number of small units can be arranged tosuit accommodation requirements rather than one large installation requiring considerable installationspace and long lengths of piping.

Figure 2.1-1 Schematic Diagram of Sewage Treatment Unit


Page 2-2

2.2 GENERAL

Basically the Super Trident Sewage Treatment unit comprises a tank, divided into three water tightcompartments - an aeration compartment, a settling compartment, and a chlorine contact compartment.

The incoming sewage enters the aeration compartment, where it is digested by aerobic bacteria andmicro organisms which are promoted in the sewage itself by the addition of atmospheric oxygen.

From the aeration compartment the sewage flows into the settling compartment where the aerobicbacteria floc, known as activated sludge, is settled out producing a clear effluent which passes througha chlorinator and into the chlorine contact compartment before being finally discharged.

2.3 DETAILED DESCRIPTION

2.3.1 Aeration Compartment

In this compartment of the treatment unit, aerobic bacteria, that is those bodies requiring dissolvedoxygen to exist, reduce the influent waste material which mainly comprises Carbon, Oxygen,Hydrogen, Nitrogen and Sulphur into Carbon Dioxide, Water and new bacteria cells. The CarbonDioxide is emitted throughout the vent system whilst the water together with the bacteria cells aredisplaced into the settling compartment.

Air is supplied to the sewage from a rotary compressor through a number of fine bubble diffusers,located at the bottom of the tank but removable from the side for ease of maintenance.

The air provides the life giving oxygen to the aerobic organisms and also keeps the contents of thetank intimately mixed with the incoming raw sewage and the returned settled activated sludge.

2.3.2 Settling Compartment

In the settling compartment the bacteria settle out and are returned to the aeration compartment bythe airlift tube. This takes its supply from the bottom of the compartment and discharges to theaeration compartment, via a visual indicator pipe which enables a check to be made on the sludgereturn. The settling compartment of the unit is of the hopper type. The sloping sides prevent thesludge from accumulating and direct it to the suction side of the air lift. The effluent enters thecompartment through a stilling chamber and rises through the clarifier, to discharge to the chlorinecontact compartment through a weir at the top of the clarifier. A surface skimmer is provided to skimoff and return surface debris back to the aeration tank - a second airlift is used for this purpose.

2.3.3 Chlorine Contact Compartment

The effluent is stored in this compartment after chlorination to allow time for the chlorine to kill off anyharmful bacteria.

On units fitted with a discharge pump two level regulators (or float switches) are fitted to control theoperation of the pump, see Electrical Controls.

An additional float switch is fitted which operates an alarm signal should the level rise above thenormal “high” position.

An emergency overflow pipe connection is also provided through which only treated effluent can pass.


Page 2-3

2.3.4 Chlorinator

1. Tablet disinfection (standard). This is of the flow-through type and all of the effluent passesover the specially formulated tablets and absorbs the required amount of chlorine before flowinginto the chlorine contact tank.

One or two tubes depending upon test results (see Section 4 - Determination of Residual ChlorineContent) are filled with tablets and placed in position in the chlorinator with the cut-away sectionsat the lower end. The effluent flows around and past the lower end of the tube and comes intocontact with the tablets.

At the outlet end of the chlorinator is a control weir arranged so that as the effluent flow increasesthe level rises and more tablets come into contact with the effluent. In this way the chlorine uptakeis always sufficient for sterilisation of the effluent.

2.4 Discharge Pump

These pumps are horizontal close coupled centrifugal units with a 2-bladed open impeller of the non-clog type. They are designed for capacities up to 40 m3/h and operate at 2-pole motor speeds.

The medium head pump is suitable for heads up to 18 metres. The high head pump is suitable forheads up to 25 metres.

The pumps are particularly suited for effluent discharge, sump drainage and handling dirty watercontaining solids up to 25mm. diameter.

2.5 Air Compressor

One rotary vane air compressor is fitted as standard, with a second standby unit available as anoption.

2.6 Electrical Controls

2.6.1 General

The rotary air compressor motors, are operated by manual switches on the control panel. When adischarge pump is supplied it is controlled by float switches fitted in the final effluent tank with anoverriding HAND/AUTO switch on the control panel.

2.6.2 Float Switches

These are of the magnetic reed type with three floats mounted on a common stem and wired to thecontrol panel. The two lower floats operate the discharge pump(s), and the upper float operates thehigh level alarm circuit should the level rise above normal.

2.6.3 Operation

When the system is fitted with a discharge pump and the control switch is in the AUTO position, thetypical sequence of operation is as follows:

When the liquid reaches the “High” level float switch, the pump motor is started and the liquid beginsto discharge from the compartment. The pump continues to run until the liquid drops to the level of the“Low” level float switch when the motor is switched off.

Should the “High” level alarm float switch fail to operate for any reason, the level of the liquid will reachthe “High” level alarm float switch, and actuate the alarm circuit.

When the control switch is moved to the HAND position and the ON push-button switch is operatedthe pump motor will run, to empty the tank for draining or cleaning until the control switch is moved toOFF.


Page 2-4

When dual pumps are supplied the second pump is typically a standby unit, however if requested thesequence of operation may be arranged for lead follow or parallel operation to suit special on-boardconditions.

A control panel General Arrangement drawing including control switch layout is included in Section 6.5and a circuit wiring diagram is shown in Section 6.7.

2.6.4 Remote Emergency Stop

Terminals are provided in the control panel for customer supply and connection of a remote stay puttype emergency stop button. Operation of the button will prevent all pumps and compressors fromrunning. If the compressor is stopped for a prolonged period the loss of process air may result inanaerobic conditions. To prevent this occurring, either an emergency oil free air supply must be fitted,taken from the ships air system or the unit must be emptied and flushed out as detailed in Section 5.

SECTION 3 – INSTALLATION

Page 3-1

SECTION 3 - INSTALLATION

3.1 GENERAL DATA

The unit should be installed in a position where it is as level as possible when the ship or rig is in itsnormal position. Bolt holes, are provided in the baseplate of the unit for fixing. It is recommended thatthe Super Trident is installed with the longest side in a fore and aft direction to minimise the effect ofrolling motion. The maximum angle of roll or pitch at which the unit will function satisfactorily is 15°either side of the vertical.

To facilitate periodic maintenance and for use in an emergency, a direct overboard by-pass of the unitmust be provided. Galley waste water, which meets solids discharge standards can be led, via agrease trap, to the waste water mains. Where solids are disposed of by macerator / garbage disposalunit, Hamworthy must be consulted.

CAUTION: Welding must not be carried out on the tank surfaces or the internal coating will bedestroyed.

The incoming electrical control terminals are clearly marked in the control panel.

The following should be read in conjunction with the General Arrangement drawing supplied with theequipment, or as part of the contract documentation.

A General Arrangement drawing is included in Section 6.1 for reference purposes only, but this maynot fully represent the installation.

Access to the following items must be arranged:

1. Electric Control Panel. Switches are mounted on the outside of the door. The open doordimension is stated on the General Arrangement drawing.

2. Chlorinator. Tablets are to be added as necessary. See Section 4 - Determination of ResidualChlorine Content.

3. All valves. Required to be operated during cleaning.

4. Rectangular and circular covers in the top and sides of the units. During servicing of theaerators and internal examination after annual cleaning these are removed.

5. Discharge pumps and air blowers for maintenance.

6. Float switch assembly.

The following pipe connections are required to the unit:

1. Raw sewage inlet.

2. Gas vent to atmosphere.

3. Overboard discharge connection (from pump discharge) and one sea water filling connection.

4. Inlet for water from sinks, showers, etc., that cannot gravitate directly overboard.

5. Emergency overflow connection. It is important that the pipe does not rise above the height of theboss on the tank side. Can be piped to bilge via a water trap, or directly overboard, or into a storagetank.

6. Recirculation line, 25mm flexible hose (for cleaning).

With due consideration of the foregoing, i.e. access required to various items and all pipe connectionsto be made, the tank and pump can be positioned to suit the space available.


Page 3-2

INSTALLATION INSTRUCTIONS – T0504007


Page 3-3


Page 3-4


Page 3-5


Page 3-6


Page 3-7

RECOMMENDATIONS ON VENT SYSTEM DESIGN – R58386


Page 3-8


Page 3-9


Page 3-10

Figure 0-1 Discharge Pump Installation

3.2 FITTING INSTRUCTIONS FOR ITEMS PACKED SEPARATELY FOR SAFE TRANSIT

1. Chlorinator tablet tubes. These are mounted in the chlorinator in the position shown on theGeneral Arrangement drawing.

3.3 COMPARTMENT VENTILATION

Ensure that the compartment containing the Sewage Treatment plant has an unrestricted supply ofclean air (See Technical Data, Section 1 for flow rate).

SECTION 4 - OPERATION

Page 4-1


4.1 HEALTH AND SAFETY INFORMATION

Personnel:Protection

Safety glasses and gloves should be worn when taking samples,refilling chlorine tablet tubes and general maintenance of the system.

Product: DPD No. 4 Tablets

Application: For water testing applications only.

Properties: White tablets. Non-combustible. Corrosive if dissolved in water to give slightlyacidic solution.

Hazards: Of low toxicity. Minimal hazard during normal handling and use as directed.

Storage: Store in original containers. Keep dry. Keep away from children.

Shelf Life: 1½ years unopened at 30°C and relative humidity of 80%.

Handling: Use only as instructed. Avoid handling whenever possible. Wash hands afteruse. Not to be taken.

Transport: Not regulated.

In case of contact withskin/eyes Wash with plenty of water

If swallowed Give plenty of water to drink. OBTAIN MEDICAL ATTENTION.

In case of spillage Sweep up and wash away with water

In case of fire Water and all extinguishers may be used.Tablets are non-combustible.


Page 4-2

Product: Calcium hypochlorite mixture tablets

Application: Disinfection and sanitisation of effluent

Composition: Calcium hypochlorite hydrated and 1, 3, 4, 6 tetrachloroglycoluril (75%)and inerts (25%)

Properties: White tablets. Oxidising agent. Corrosive.

Hazards: Do not mix or contaminate calcium hypochlorite tablets with any othersuppliers or any foreign materials such as grease, oil, lubricants,solvents, acids, alkalis, soap products, paint products, householdproducts, pool chemicals, vinegar, garbage, beverages, pine, dirty ragsetc. Contamination or mixing with these types of chemical and productsmay result in fire or explosion. The fire can be of great intensity.Chlorine gas may also be produced.

Storage: Prevent any hot or burning material such as a lighted cigarette fromfalling into any container of tablets.

Keep in a cool (20 - 23°C) dry place in the original container. Alwaysreplace cover. Do not store in any other container.

Do not re-use empty container. Wash thoroughly with water and discardclean container in a safe place.

Do not expose to temperatures above 55°C.

Shelf Life: Un-opened 12 months at 23°C6 months at 30°C3 months at 45°C

Handling: Do not allow contact with eyes, skin, mucous membranes or clothing. Itmay produce severe chemical burns. Harmful or fatal if swallowed.

Handle containers with care. Do not drop, roll or skid. Keep upright.

Handle calcium hypochlorite tablets only with clean, dry hands, rubbergloves or metal utensils. Any contamination may result in fire.

In case of contact with eyes/skin, flood with plenty of water. OBTAIN MEDICAL ATTENTIONIMMEDIATELY for eyes. Obtain medical attention for skin if irritation persists.

If swallowed, feed bread soaked in milk, followed by olive oil or cooking oil.

DO NOT INDUCE VOMITING. OBTAIN MEDICAL ATTENTION IMMEDIATELY.

In case of spillage, dispose of with large amounts of water.

In case of fire, drench with water and cool the surrounding area with water.


Page 4-3

4.2 PREPARATION OF UNIT FOR INITIAL OPERATION

(For Valve number positions see Section 3 - Discharge Pump Installation)

1. Ensure that all valves in the air supply lines are open, except standby compressor deliveryvalve. Close control panel isolator. Switch the service compressor on and check for correctrotation by placing a hand over the inlet. Suction effect indicates correct rotation. Checkoperation of relief valve by closing compressor discharge valve. Open compressor dischargevalve to check that relief valve reseats. Repeat this for standby air compressor (if fitted).

2. With duty compressor running, partially fill unit with water to cover diffusers. Open valves todiffusers, close valves to air lifts and confirm air to each diffuser. Select auto and No. 1 dutydischarge pump on panel.

3. Close all side hatches on tank, close valves 1, 3, 4 and 6. Open valves 2 and 5 and fill unit withclean sea water or fresh water until water flows over skimmer, and through chlorinator. Checkfor leaks at covers. Close valves 2, 5 and 7 (when fitted), open 3 and soil inlet valve, togetherwith 4 and 6 of duty discharge pump.

4. Check that liquid is flowing through the visual indicator pipe in the sludge return line. The airflow is controlled by the air valve and should be set, during normal operation, to give as high asludge return as possible whilst ensuring that the liquor does not become clear. If this happensthe airlift should be reduced until the return is seen to darken again. Following initial filling theairflow should be set to give the minimum liquid flow and then be gradually increased in line withthe above instructions as the solids content of the unit increases. The skimmer airlift should beadjusted to give the minimum reliable liquid flow.

NOTE: Skimmer air lift can empty skimmer. Adjust valve only when water is in skimmer tray, i.e.when being fed.

5. Partially fill disinfectant contact tank and prime discharge pump(s).

6. Check pump rotation and selector switch operation (dual pumps).

7. Check operation of pumps from float switch when in “AUTO”.

8. Fill contact tank and check time required to discharge contents. Check for signs of cavitation.

9. Check that water is not pumped from syphon vent in discharge pipe.

10. Close up tank.

11. Fill chlorinator tubes with tablets if in restricted waters (when fitted). Approximately 2.5 kg oftablets are required to fill one tube.

12. Check air pressure above liquid in aeration tank with manometer. Not to be more than 15mm(H20) with blower running.

13. Open raw sewage and grey water (when fitted) inlet valve(s) to put unit on line.

14. Refer to sample procedures, operation and maintenance requirements including desludging.

4.3 DETERMINATION OF RESIDUAL CHLORINE CONTENT

4.3.1 General

A chlorine test is supplied so that the residual chlorine content of the treated sewage effluent may bedetermined. A sample of this effluent is obtained by way of the sampling valve. Full instructions forcarrying out the test are supplied with the kit which consists of the following items:


Page 4-4

1 Colour Comparator50 D.P.D. Test Tablets in 5 foil packets(10 per packet) HP & C No. T92010051 Cleaning Brush1 Stirrer

4.3.2 Sampling Instructions

Ensure tubes are clean then:

1. Fill the middle and right hand chambers with sample up to line.

2. Add D.P.D. tablets to right hand chamber and crush with stirrer. (Replacement tablets Pt. No.T9201005).

3. Make comparison.

The typical chlorine residual should be between 4 ppm and 6 ppm.

There is no upper limit but should the residual be above 6 ppm use only one chlorinator tablet tube.Should the residual be consistently below 1 ppm then the disinfecting effect may not be sufficient.Check that both the sample tablets and calcium hypochlorite tablets are within their shelf life and ifgrey water is being fed to the chlorine contact tank, check that the maximum daily flow does notexceed twice the designed daily black water flow specified in section 1.

If liquid disinfection is fitted adjust the dosing pump flow to achieve a 5 ppm residual.

NOTE: In waters not covered by regulations, the chlorination tablets are not necessary. Averageusage is 2 grammes per person per day.

4.4 Disinfectant Cleaners

Disinfectant toilet cleaners used in large quantities can be detrimental to biological treatment plants.They should be used very sparingly.

4.4.1 Approved Biological Toilet Cleaners

Gamlen Gamazyme TD500 (liquid)Gamlen Gamazyme 700FN (powder)Ubichem ActizymeArrow Tolette

4.4.2 Approved Descaler

Gamlen Darentab 664

4.5 DESLUDGING TO AN INCINERATOR

4.5.1 General

1. Sludge from the Super Trident can be disposed of to the Hamworthy Neptune Incinerator, but itshould be noted that the water content of the sludge is in excess of 99% and hence fuel will beused just to evaporate this water.

It is therefore an advantage to desludge the Super Trident in the normal way at sea whenoutside restricted waters.

2. When it is not possible, however, the sludge from the Super Trident should be removed daily inthe quantities shown for the unit in use.


Page 4-5

ST6A 135 Litres

A 1" BSP connection is provided on the Super Trident for this purpose and the sludge can thenbe pumped direct into the sludge tank provided with the incinerator. In this way the smallquantity of sewage sludge will be mixed with waste oil and incinerated without using fuel.

3. When removing sludge daily in the quantity shown for the Super Trident, the suspended solidsreading for the aeration tank should remain constant and should be checked approximatelytwice a week. If the suspended solids are increasing, then the quantities of sludge removedshould be increased a little until a constant reading is obtained. Alternatively, if the suspendedsolids are decreasing the sludge quantity should be reduced.

4.5.2 Using a Sludge Pump

A small positive displacement pump (with 1" B.S.P. connections) can be supplied for desludging theSuper Trident. The starter provided is fitted with an adjustable time switch which will run the sludgepump for sufficient time to remove the correct quantity of sludge. The time switch should be adjustedto achieve the correct desludging rate.

It is recommended that the starter is fitted adjacent to the incinerator and sludge tank control panelsso that the desludging operation can be carried out in a position where the sludge tank level indicatorcan be observed.

4.5.3 Using the Super Trident Discharge Pump

The Super Trident discharge pump can be used to desludge to the incinerator sludge tank but, due tothe large capacity of the pump, care must be taken not to overfill the sludge tank.

Volt free contacts are available on the level switches in the sludge tank control panel and it is stronglyrecommended that these are used to provide a remote indication adjacent to the Super Trident controlpanel, of the sludge tank level. In this way, desludging of the Super Trident can be carried out withoutthe problem of overfilling the sludge tank.

The quantities shown in paragraph 2 must still be adhered to, but to simplify the operation thedesludging can be carried out twice a week instead of daily.

To desludge, close valve number 3 and open valve number 1 (refer to section 3 - Discharge PumpInstallation) and switch discharge pump to manual and allow pump to run for two minutes or untilsludge tank is full. Then stop the discharge pump and close the valve.


Page 4-6

4.5.4 Key to Symbols shown on Schematic Drawing A19170

A. Super Trident Discharge Pump for discharge of effluent and desludging overboard.B. Super Trident UnitC. Macerator must be fitted when desludging to IncineratorD. Sludge burner connection 1/2" B.S.P.E. Incinerator unitF. Sludge burner metering pumpG. Incinerator sludge tankH. Engine room sludge transfer pumpJ. Engine room sludge tankK. Alternative desludging. Metered quantity daily by sewage sludge transfer pump to

incinerator sludge tank. The operation must be carried out daily in the followingapproximate quantities.

ST6A 135 Litres

Key to symbols in Figure 4.5-1.

* These items and all pipework are not Hamworthy supply.

+ Macerator and Pump are not Hamworthy supply unless specially ordered.


Page 4-7

Figure 4.5-1 Schematic System Layout Sewage Treatment Unit / IncineratorDrawing No. A19170 Iss.2

SECTION 5 - MAINTENANCE

Page 5-1


5.1 GENERAL

The item numbers in the text refer to the item numbers called up on the appropriate SectionalArrangement included in Section 6.2. When ordering spare parts or in any correspondence the unitnumber stamped on the nameplate must be quoted. Please also give the drawing and item numberand full description of the item required as quoted on the appropriate List of Parts and SectionalArrangement drawing.

Table 5.1-1 Trouble Shooting Guide

Problem Cause Remedy

Tank overflow. Pump failure. Check electrical circuit.

Blockage. Check for pipe blockage.High level alarm.

Excessive input. Check for leaking flush valves onw.c.s.

Noxious odour emissions. Anaerobic condition within thetank.

Ensure compressor is operatingcorrectly. Check sludge returnair-lifts are working. Checkaeration tank air diffusers forblockage.

High sludge level in aeration tank. Check desludging requirement.

Lack of oxygen. Check compressors diffusers,filters and valve positions.

Low, micro-organism levels. Eliminate disinfectant cleanersfrom system.

Sludge not returning from settlingtank or skimmer.

Check air lifts are working,adjusted to give required flow.

Excessive hydraulic throughout. Check for leaking flush valves onw.c.s and urinals.

Effluent quality poor.(Note: Allow 14 days conditioningperiod from initial start-up).

Scum build up on surface insettling tank.

Check air lifts operational, clearscum from settling tank, pump outand clean settling tank.

Foaming in aeration tank and upvent line. Excessive use of cleaning agents.

Use low foam cleaners andprevent emptying of cleanersbuckets down w.c.s.


Page 5-2

5.2 MAINTENANCE SCHEDULE

5.2.1 Weekly

When in controlled waters replenish the supply of tablets in the Chlorinator. Fill tubes completely andreplace cap. Use only recommended tablets and never allow the level to fall below ¼ full. Check alsothe air supply pressure gauge reading and that activated sludge is being returned through thetransparent pipe on top of the tank. The cock valve should be carefully adjusted to give the requiredflow. Check the chlorine content of the effluent. (See section 4 - Determination of Residual ChlorineContent).

Coarse screen filter to be inspected and any plastic bags or other debris etc. to be removed. Accessto screen is obtained through inspection cover.

5.2.2 Monthly

Change over from the duty to the standby air compressor. Ensure that the delivery valve is openbefore operating change over switch and then close delivery valve on unit not running.

Check the contents of the aeration compartment for quantity of suspended solids using the graduatedcylinder supplied. Fill the cylinder to 100 ml level and allow to stand for 30 minutes. If the level of thesettled sludge is above the 60 ml level, the unit must be partially desludged as detailed below, whennot in controlled waters or to a shore facility.

1. Close the valves on the raw sewage and waste water inlet lines and open the overboard by-pass valves.

2. Select the discharge pump control panel switches to OFF.

3. Close valve number 3 and open valve number 2.

4. Select HAND on the control panel switch to operate duty discharge pump.

5. Run the discharge pump until approximately 50% of the aeration tank contents have beendischarged.

6. Remove cover in the top of the aeration tank and check that the screen below is clear, alsoremove the cover in the top of the settling tank and check the surface is clear of scum. If scumis present hose down the surface or pump out and clean settling tank as necessary.

7. Refill unit with clean fresh or sea water and select valves for normal running.

8. Select the discharge pump control panel switches to AUTO.

5.2.3 6 Monthly

Examine filter cartridges fitted to the aeration compressor and replace if dirty. (These may be cleanedby blowing compressed air from the inside of the cartridge outwards in an emergency). Check thefunctioning of the non-return valve fitted to the air line.

5.2.4 Annually

Drain and clean all compartments of the unit and inspect and repair any damaged coating. Inspect thedischarge pumps and air blowers for wear. Replace aerator air diffuser elements.

NOTE: If air pressure rises above 0.2 bar (3 lbf/in2) above original commissioning pressure at anytime, check both filter cartridges and aerators and replace as necessary.


Page 5-3

5.3 CLEANING THE CHLORINATOR

The chlorinator must be cleaned periodically, at intervals determined by the characteristics of thewater used, and the amount of mineral deposits accumulated on all contacted surfaces. Should it berequired to clean the unit before all the tablets have been dissolved, the tablets must be removed andall surfaces must be washed and cleaned with a stiff brush (NOT WIRE).

CAUTION: 1. Never use water above 65°C (150°F) in this chlorinator. To do so may result indamage.

2. Use only the recommended tablets as supplied initially with the unit.

5.4 DRAIN AND CLEAN UNIT

Safety Notes:

1. Never leave the Trident sewage treatment unit full of sewage without the air compressorsrunning.

2. To completely shut-down, drain and clean as shown below and leave empty, or alternativelyrefill with clean water and ready for use.

3. Never enter a sewage treatment unit unless it is thoroughly cleaned out, with all inspectioncovers removed, or breathing apparatus is worn.

During these operations the pump should not be allowed to run dry for extended periods.

Refer to the notes regarding valve numbers in Section 3 for discharge pump installation.

1. Close the valves on the raw sewage and waste water inlet lines, or alternatively, ensure that theconnected appliances are not used.

2. Select the discharge pump control panel switch to OFF.

3. Close valve numbers 1, 2 and 5.

4. Open valve numbers 3, 4 and 6.

5. Select HAND on the control panel switch to operate the discharge pump.

6. Pump or drain the chlorine contact tank contents overboard.

7. Close valve number 3 and open valve number 2.

8. Pump or drain the aeration compartment contents overboard.

9. When the aeration compartment is empty, close valve number 2.

10. Open valve number 1 and empty the settling tank.

11. Close valves 4 and 6 and open valves 1, 2 and 3, refill unit through valve 5 taking care not toover pressurise the tank.

12. Where a recirculation line has been fitted, Super Chlorinate the unit before entering the tank,close valves 2, 3 and 5 and open valves 3, 4, 6 and 7. Start discharge pump, circulate tankcontents for approximately 30 minutes. Then close valve 1 and open valve 3. Circulate for afurther 30 minutes. After circulation pump out unit as previously described.

13. Inspect the internal coating and recoat as necessary with a high grade coal tar epoxy.


Page 5-4

14. Examine the inspection cover joints for serviceability and renew if necessary. Refit the jointsand covers.

15. Inspect the filter periodically. This can be cleaned in situ with a hose or removed from the tankand cleaned.

NOTE: When a standby discharge pump is fitted, refer to Section 3 - Discharge Pump Installation andensure that the appropriate suction and delivery valves serving the pump in use are “open”and those serving the standby pump are “closed”.

5.5 AIR DIFFUSER ASSEMBLIES

5.5.1 General

The air diffuser elements are made from a porous ceramic material and must be handled with care toavoid breakage’s. The diffuser elements must be replaced annually or at any time when the pressuregauge reading rises 0.2 bar (3lbf/in2) above original commissioning pressure, or the air pressure reliefvalve is blowing. Ensure that the air filter cartridges are clean and that the air lift valves are adjustedto give the required flow.

5.5.2 Element Replacement

This must normally be carried out during annual servicing with the tank empty.

Remove respective side manhole cover and disconnect running union located immediately insidecover. Lift out diffuser assembly complete.

Remove wingnut and washer and withdraw ceramic element.

Fit a new element taking care that the rubber washers are in place at either end. Replace the wingnuttaking care not to overtighten.

Replace diffuser assembly in the tank taking care to locate spigot in the bracket in the bottom of thetank. Replace manhole cover.


Page 5-5

5.6 RECOMMENDED SPARES LIST

Table 5.6-1 Recommended List of Spares

Item Description

Impeller screw

Peel off shim

Mechanical sealPump

Tab washer

Carbon blades

Filter elements

Set of bearingsCompressor

Set of spacers and tolerance rings

Contactor

Auxiliary contact lamp

2 x 5A fusesControls

2 x 2A fuses

Sampling kitLovibond DPD No. 4 tablets

Measuring Cylinder

Chlorine tablets Drum of tablets

SECTION 6 – KEY COMPONENTS

Page 6-1

SECTION 6 - KEY COMPONENTS

6.1 DISCHARGE PUMP

6.1.1 TECHNICAL DATA

6.1.1.1 STANDARD PUMP PERFORMANCE

Pump type Capacity HeadB50 x 50HC Medium Head Up to 35 m3 /hr Up to 18 MetresB50 x 50HC High Head Up to 42 m3 /hr Up to 25 Metres

6.1.1.2 RECOMMENDED TIGHTENING TORQUE

Impeller Screw (Item 8) 3. 0 kg mStud and Nut (Item 22 and 23) 5.0 kg mBolt and Nut (Item 19 and 20) 3.0 kg m

6.1.1.3 MOTOR SPEED

50 Hz (2 pole) 2900 rev/min.60 Hz (2 pole) 3480 rev/min.

6.1.1.4 GENERAL DIMENSIONS

Refer to the General Arrangement drawing supplied with the contract documents for maximumequipment weight, dimensions and the minimum clearance needed for dismantling.

6.1.1.5 ROTATION

The direction of rotation is clockwise when looking at the non-drive end of the pump.

6.1.1.6 BEARING LUBRICATION

The motor bearings must be lubricated as detailed in the motor manufacturer’s handbook.


Page 6-2

6.1.2 DESCRIPTION

6.1.2.1 GENERAL

These pumps are horizontal close coupled centrifugal units with a 2-bladed open impeller of the non-clog type. They are designed for capacities up to 40 m3/h and operate at 2-pole motor speeds.

The medium head pump is suitable for heads up to 18 metres. The high head pump is suitable forheads up to 25 metres.

The pumps are particularly suited for effluent discharge, sump drainage and handling dirty watercontaining solids up to 25mm. diameter.

6.1.2.2 PUMP INNER COVER

The inner cover is bolted onto the electric motor and houses the mechanical seal.

6.1.2.3 PUMP CASING

The pump casing is bolted to the inner cover and incorporates the suction branch which is in-line withthe motor shaft, and the discharge branch which is arranged at right angles with the suction branch.

6.1.2.4 MECHANICAL SEAL

The mechanical seal arrangement comprises two basic parts, a stationary seal ring, located in thepump cover, and a rotating seal ring, carried on the impeller hub. A spring maintains pressurebetween the seal faces, and lubrication is by the pumped fluid. Circulation passages are arranged tomaintain flow rate and prevent the accumulation of sediment.

6.1.2.5 IMPELLER

The impeller is keyed to the motor shaft and retained by a screw and lockwasher. A shim is fitted atthe bottom of the impeller hub to permit the running clearance to be correctly set between the impellerand inner cover.

6.1.3 INSTALLATION

6.1.3.1 INSTALLATION DATA – PUMP WEIGHT AND DIMENSIONS

The maximum weight of the pump, the overall dimensions, and the minimum clearances for removal ofparts are shown on the General Arrangement Drawing, normal supplied with the contract documents.

For dimensional data on any particular installation, reference must always be made to the GeneralArrangement drawing.

6.1.3.2 INSTALLATION PROCEDURE

GeneralIt is of the utmost importance that sufficient space is provided around the pump to allow personnelaccess, and to facilitate removal and installation of components during normal maintenance routines.It is advisable to leave adequate headroom above the unit for crane joists or lifting tackle. Minimumrequired clearance dimensions for components removal are shown in the General Arrangementdrawing supplied with the contract documents.

PipeworkAll pipework should be constructed so that pipe strains are eliminated and the unit protected againstfrost.


Page 6-3

Pipe fittings must fit easily without strain and suction and discharge pipes must be supportedindependently near the pump so that no strain is transmitted to the pump casing. The bore of thesuction line must NOT be less than the pump suction flange nominal bore.

Suction piping must be absolutely air tight and as short as possible, avoiding bends and elbows.Also, it should be between one and two sizes larger than the suction opening of the pump if thesuction line exceeds 15m (50ft) in length. Care should be exercised in laying, to eliminate loops whichcreate air pockets. If possible, check with water pressure for leaks.

Electrical InstallationEach installation must be wired in accordance with recognised standards of practice. Earth continuitymust be provided for all exposed metalwork of electrical apparatus, cable sheaths and armour, cableglands, conduits, ducts, trunking, etc. Flexible conductors must be provided to earth resilientlymounted equipment.

Ensure that overload relays are set to the correct current rating of the motor(s) they are protecting.

Direction of RotationOn initially starting the pump, ensure that it is running in the direction indicated by the arrow on thepump body. If the direction is incorrect, the wiring connections at the motor terminal box must bereversed.

6.1.4 OPERATION

WARNING: 1. DO NOT ATTEMPT TO START THIS PUMP UNTIL THEINSTRUCTION BOOK HAS BEEN READ AND UNDERSTOOD.

2. DO NOT ATTEMPT TO MAKE ADJUSTMENTS TO THE PUMP, ITSCONNECTIONS OR FITTINGS WHILST THE MACHINE IS RUNNING.

3. DO NOT ATTEMPT TO RUN THE PUMP WITHOUT ADEQUATEGUARDING.

4. HEALTH AND SAFETY ACT COMPLIANCE: BEFORE OPERATINGTHE EQUIPMENT, USERS MUST BE MADE AWARE, AND ENSURECOMPLIANCE WITH, THE HEALTH AND SAFETY REGULATIONSAPPROPRIATE TO THIS CLASS OF WORK.

5. OPERATORS SHOULD BE ADEQUATELY QUALIFIED PERSONNELFAMILIAR WITH THIS TYPE OF EQUIPMENT.

6.1.4.1 CHECKS BEFORE RUNNING FOR THE FIRST TIME

Before running the machine for the first time after installation or maintenance, proceed as follows:

16. After initial installation, fill the pump with the liquid to be pumped (see ‘Priming’, below).

17. Rotate the pump manually through at least one revolution to ensure that the pump is free torotate. (It may be necessary to remove the motor fan shroud to achieve this).

18. Check that the motor bearings are lubricated as detailed in the motor manufacturer’s handbook.

19. Ensure that the suction and discharge line stop valves are in the “Open” position.

20. On initially starting the pump, ensure that it is rotating in a clockwise direction when viewed fromthe driving end of the shaft. If rotation is incorrect, reverse any two wiring connections at theterminal.


Page 6-4

6.1.4.2 PRIMING

The pump can be primed by filling with the liquid to be pumped. The installation of a tee in thedischarge line just above the pump will provide a means of filling. Remove the priming plug and pourliquid through the open branch of the tee until the pump and suction line are completely filled, thenreplace the priming plug and start the pump.

6.1.4.3 STARTING THE PUMP

1. Prime the pump in accordance with instructions under ‘Priming’.

2. Make sure suction and discharge valves are open. DO NOT START PUMP AGAINST ACLOSED DISCHARGE VALVE.

3. Start motor.

6.1.4.4 REGULATING FLOW FROM PUMP – PUMPED MEDIA WITHOUT SOLIDS

The quantity of fluid delivered by the pump is regulated by opening or closing the delivery valve to givethe required rate of flow. Care must be taken not to overload the motor or reduce the rate of flow tosuch a small capacity that over-heating of the pump will occur.

CAUTION

WHEN PUMPING MEDIA CONTAINING SOLIDS, THE DISCHARGE RATE MUST NOT BEREGULATED BY THE DELIVERY VALVE.

6.1.4.5 STOPPING THE PUMP

To stop the pump, stop the motor.


Page 6-5

6.1.5 MAINTENANCE

WARNING: 1. BEFORE PROCEEDING WITH MAINTENANCE OF THE PUMP, IT MUSTBE STOPPED AND ISOLATED ELECTRICALLY AND MECHANICALLYAND VISIBLE WARNING NOTICES DISPLAYED. SOME UNITS MAY BEON AUTOMATIC STANDBY DUTIES. ISOLATORS MAY BE REMOTEFROM THE PUMP. IN THESE CASES EXTRA CARE IS NECESSARYTO BE ABSOLUTELY SURE THAT ISOLATION OF THE UNIT ISCOMPLETE.

2. PUMPS HANDLE VARIOUS LIQUIDS, SOMETIMES NOT THOSE FORWHICH THE PUMP WAS INITIALLY SUPPLIED. KNOW THEPROPERTIES OF THE LIQUIDS THAT HAVE BEEN PUMPED, TAKEANY ACTIONS NECESSARY TO MAKE SAFE AND BE AWARE OF THERECOMMENDED PROCEDURES TO FOLLOW IN THE EVENT OF ANEMERGENCY.

3. HEALTH AND SAFETY ACT REQUIREMENTS COMPLIANCE: BEFOREWORKING ON THIS EQUIPMENT PERSONNEL MUST BE MADEAWARE OF, AND ENSURE COMPLIANCE WITH, THE HEALTH ANDSAFETY REGULATIONS APPROPRIATE TO THIS CLASS OF WORK.

4. ONLY ADEQUATELY QUALIFIED PERSONNEL FAMILIAR WITH THISTYPE OF EQUIPMENT SHOULD CARRY OUT MAINTENANCE ORADJUSTMENTS.

5. DO NOT ATTEMPT TO REPAIR OR OVERHAUL THE PUMP UNTIL THISINSTRUCTION BOOK HAS BEEN STUDIED.

6. BEFORE COMMENCING ANY WORK A CHECK OF AVAILABLESPARES SHOULD BE MADE, E.G. REPLACEMENT OF O-RINGS,JOINTS, SEALS.

7. BEFORE ATTEMPTING TO DISMANTLE THE PUMP, ENSURE THATTHE PUMP SUCTION AND DELIVERY VALVES ARE CLOSED ANDTHAT THE CASING DRAIN PLUG IS REMOVED.

6.1.5.1 GENERAL

The item numbers in the text refer to the item numbers called up on D8103 Sectional Arrangementincluded in Section 6. When ordering spare parts or in any correspondence relating to the pump, theunit number stamped on the nameplate must be quoted. Please also give the drawing and itemnumber and full description of the item required as quoted on the appropriate List of Parts andSectional Arrangement drawing.

A complete pump and motor are readily available as standard spares so that should trouble beexperienced with either of these relatively small items it can be quickly remedied without interferingwith the normal duties of the unit.

A maintenance schedule is given in Table 5.1, and a fault finding chart in Table 5.2, located at the endof section 5.

6.1.5.2 LUBRICATION

The pump requires no lubrication.


Page 6-6

The motor bearings on the B50 x 50HC must be lubricated as detailed in the motor manufacturer’shandbook (most motors will have ‘Sealed-For-Life’ bearings).

6.1.5.3 PREPARATION FOR DISMANTLING THE PUMP

1. Ensure that the electrical power supply to the motor is switched off.

2. Shut the suction and delivery valves in the system pipelines.

3. Remove the drain plug (27) and joint washer (28) from the pump casing.

6.1.5.4 DISMANTLING PUMP

REFER TO SECTIONAL ARRANGEMENT DRAWING D8103

1. Remove the bolts securing the electric motor to its seating and the nuts (20), washers (34) andbolts (19) securing the inner cover to the casing.

2. Withdraw the motor and pump from the casing and remove the ‘O’-ring seal (15)

3. Bend back the locking tab washer (17) and remove the impeller screw (8), tab washer and ‘O’-ring(14).

4. Turn the impeller (5) so that the jacking screw holes are horizontal, as shown on the SectionalArrangement drawing, and screw in the two jacking screws to withdraw the impeller.

5. Withdraw the stationary part of the mechanical seal (16) from the inner cover (2) and the rotatingpart from the impeller.

6. Remove the nuts (23) and spring washers (25) and remove the inner cover from the electricmotor.

7. Remove the peel-off shim (11) and the liquid thrower (10).

6.1.5.5 INSPECTION

Thoroughly clean and examine all components for corrosion, cracks, wear or any other damage andrenew any parts found defective. If the mechanical seal faces are damaged, the complete sealassembly must be renewed. The ‘O’-ring seals (14, 15) and tab washer (17) must be replaced withnew ones.

6.1.5.6 ASSEMBLING PUMP

1. Position the liquid thrower on the motor shaft and the inner cover on the motor. Fit the springwashers (25) and nuts (23).

2. Impeller Shimming:

To determine the amount of shimming required between the impeller and motor shaft:

a) Position a new peel-off shim (11) in the bore of the impeller (5) (do not fit mechanical seal atthis stage).

b) Line up the keyway in the impeller with the key in the motor shaft and push the impeller ontothe shaft.

c) Place the tab washer (17) on the impeller screw (8) and fit the screw into the tapped hole inthe end of the motor shaft. Fully tighten the screw but do not lock it at this stage.


Page 6-7

d) With the aid of feeler gauges, measure the clearance between the rudimentary vanes at theback of the impeller and the inner cover (see figure below). This dimension should be0.457mm ± 0.076mm (0.018 ± 0.003 in). Subtract 0.457mm (0.018 in.) from themeasurement obtained. The resultant figure is the amount of shimming which needs to beremoved from the peel-off shim.

e.g.

Clearance measured 0.991 mm (0.039 in)Deduct required clearance 0.610 mm (0.024 in)Total to be removed from shim 0.381 mm (0.015 in)

Note: Each lamination of shim is 0.076 mm (0.003 in)

Therefore, the amount of laminations to be removed from the shim is 0.381 mm (0.015 in) orfive laminations. A new peel-off shim is 20 laminations or 1.524 mm (0.060 in) thick.

Figure 6.1-1Impeller Shimming


Page 6-8

e) Ensure that the end of the motor shaft key does not protrude beyond the end of the motorshaft or the peel-off shim pack will be fouled.

f) Remove the impeller screw and tab washer and withdraw the impeller from the motor shaft.

g) Remove the peel-off shim from the bore of the impeller and remove the number of laminationsdetermined in (d) above.

3. Smear the inside of the impeller bore with grease.

4. Fit the mechanical seal as follows:

a) Ensure the ceramic seat is fully inserted into the cup rubber. Lubricate the outside diameterof the cup rubber and also the bore of the recess in the inner cover, which locates thestationary seat, with soft hand soap and water.

b) Feed the cup rubber and ceramic seat into the recess and press into position ensuring aneven pressure over the whole of the ceramic seat face. Make sure that the cup rubber andseat are pressed fully home.

c) Stand the pump, less casing and impeller, vertically with the impeller end of the shaftuppermost.

d) Lubricate the bore of the bellows with soft hand soap and water.

e) Apply soft hand soap and water to the outside diameter of the impeller hub, and pass thebellows of the mechanical seal carefully over the taper on the hub (rubber end first) until thebellows contacts the hub shoulder.

f) Ensure that the impeller adjusting peel-off shim (11) is in position on the shaft end.

g) Line up the keyway in the impeller hub with the shaft key, locate the bore of the hub with theshaft end and push the impeller fully onto the shaft.

5. Carefully position the liquid thrower on the impeller hub.

6. Secure the impeller with the impeller screw (8) and tab washer (17). Lock the screw with the tabwasher.

Note:

Installation of the seal unit, to its working length, should be completed with 15 minutes to ensurethat the bellows is correctly positioned before it permanently grips the impeller hub.

7. Place a new ‘O’-ring seal (15) on the inner cover (2) and position the motor and pump assemblyon its mounting and secure the inner cover to the casing with bolts (19), washers (34), and nuts(20).


Page 6-9

8. Fit the bolts and washers securing the motor to its mounting.

Table 6.1-1 Maintenance Schedule

Item Action Every Year or 8,000hrs

Every 4 Years or20,000 Hrs

Inspect X‘O’-Ring Seals

Replace X

Inspect XMechanical Seals

Replace X

Pump Casing Inspect X

Impeller Key Inspect X

NOTE:

1. Where running hours and time are quoted, the shorter period is the criterion if the component is adynamic part.

2. All clearances and parts should be checked as routine if the unit is dismantled for any reason.

3. This table is for guidance only and indicates the minimum recommended schedule. This may bevaried where, for specific conditions, operating experience indicates that a difference schedulewould be beneficial

TABLE 6.1-2 Fault Finding ChartFault Cause Remedy

Delivery valve closed. Open valve.

Suction valve closed. Open suction valve.

Blocked suction pipework Clean suction pipeworkNo Discharge

Water level beyond maximum lift

of pump.

Change the set up to improve

suction head.

Air leaks or upturned loops in

suction pipework.

Attend to joints and glands in

suction system and check run

of pipe for loops.

Reduced and/or Irregular

Discharge

Choked impeller. Dismantle and clean.

Valve or non-return valve partially

closed.

Attend to valve or non-return

valve.Reduced Output and High

Temperature Actual total head exceeds max.

generated by pump.

Consult our Technical

Department giving full

particulars.

Pump Absorbing Excessive

PowerWorn motor bearing. Renew bearing.


Page 6-10

6.1.6 DRAWINGS

Drawing Number Drawing TitleD8103 Sectional Arrangement, B50x50HC 2-Pole Sewage PumpA21980 General Arrangement, B50x50HC 2-Pole Sewage Pump


Page 6-11


Page 6-13

Items List for B50x50HC 2-Pole Sewage PumpDrawing D8103, Issue 1, Sheet 3b of 3

ITEM DESCRIPTION MATERIAL QTY.

1 Pump Casing B.S.1452 Grade 250 12 Inner Cover B.S.1452 Grade 250 15 Impeller B.S.1400 AB1 18 Impeller Screw B.S.970 431s29 110 Liquid Thrower Oil Resisting Rubber 111 Peel-off Shim Brass 114 ‘O’-ring (impeller) Nitrile Synthetic Rubber 115 ‘O’-ring (casing) Nitrile Synthetic Rubber 116 Mechanical Seal Carbon/Ceramic/Nitrile/316ss 117 Tab Washer Monel 119 Bolt H.T.S. Grade 8.8 620 Nut H.T.S. Grade 8.8 622 Stud Mild Steel Grade 4.8 423 Nut Mild Steel Grade 4.8 425 Spring Washer Spring Steel 426 Nameplate Aluminium 127 Plug Brass 328 Joint Copper 329 Stud Mild Steel Grade 4.8 430 Nut Mild Steel Grade 4.8 431 Key Key Steel 134 Washer Mild Steel 639 Jacking Screw Mild Steel 250 Motor 1


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SECTION 7 – DRAWINGS AND SPECIFICATIONS

Page 6-1

6.2 COMPRESSOR

The following blower models are fitted to Hamworthy Super Trident Sewage Treatment Units.

ST6A DLT40


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Page 6-3


Page 6-4


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Page 6-7


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Page 6-9


Page 6-10

DRAWINGS AND SPECIFICATIONS

The detailed contents of Section 7 is listed at the beginning of the manual.


Page 6-11

6.3 Process and Instrument Diagram


Page 6-12

6.4 General Arrangements


Page 6-13

6.5 Sectional Arrangements


Page 6-14


Page 6-15


Page 6-16

Table 6.5-1List of Parts for Drawing D7937

ITEM DESCRIPTION001 TANK SUB-ASSEMBLY002 AIR COMPRESSOR003 CONTROL PANEL004 LEVEL SWITCH008 BLANK FLANGE009 FLANGE010 DISCHARGE PUMP012 JOINT,50NB013 JOINT014 NUT & BOLT018 CHLORINATOR019 COVER020 JOINT-FITTERS CUT021 LABEL022 NAMEPLATE023 M8 STIFF NUT025 HEXAGON SCREWS026 LABEL WARNING WELDING027 3/8" ST.ST. WASHER, EN58.028 NAME PLATE029 LABEL031 CABLE034 NAMEPLATE036 TERMINAL TAG PANEL039 JOINT WASHER FIBRE040 FLEXIBLE CONDUIT043 CABLE TIE050 CONDUIT ELBOW051 ADAPTOR054 LABEL055 LABEL056 NAMEPLATE057 RING TYPE CABLE TERMINAL M5065 CABLE 2.5MM068 SHIM069 MANIFOLD070 MANIFOLD071 GATE VALVE 2 IN072 VALVE,BUTTERFLY,WAFER073 PUMP MOUNTING074 MOTOR SUPPORT, TRIDENT TANKS.075 UNION STRAIGHT076 M10 X 25 HEX SCREW077 B.M.S. WASHER, M10 CAD PLATED.078 B.M.S. WASHER, M16 CAD PLATED.079 HEXAGON BOLT080 BOLT081 HEX NUT,M16 ZINC PLATED082 BOLT139 1.1/2"NB POLYURETHANE DUCTING

HOSE140 REINFORCED PVC HOSE144 HOSE CLIP146 M STUD ELBOW BSP BR147 FERRULE


Page 6-17

ITEM DESCRIPTION150 DIFFUSER HOLDER156 DIFFUSER ELEMENT158 COMPOSITE UNION162 FLEXIBLE HOSE163 HOSE CLIP164 BULKHEAD CONNECTION165 1/2"OD NYLON TUBE169 DIFFUSER DOWNTUBE170 ABS.BS5391 DN15X21.3 CL.T174 AIR LIFT TUBE179 SURFACE SKIMMER180 SEALING RING184 REDUCING ELBOW185 PIPE201 TEE, PVC202 REDUCING BUSH203 TUBE, PVC204 TUBE, PVC205 FLEXIBLE HOSE206 HOSE CLIPS207 HOSE CLIPS244 LABEL245 LABEL246 LABEL247 LABEL270 STIFFNUT, M6271 SPRING WASHER, M6 , ZN PLT272 B.M.S. WASHER, M6 CAD PLATED273 ELBOW,1/2"274 HOSE CONNECTOR,3/4"275 HOSE,RUBBER,3/4"276 HOSE CLIP277 BALL VALVE,3/4"278 NIPPLE,3/4"279 TEE,3/4"280 PLUG,3/4"281 NON-RETURN VALVE,3/4"282 GAUGE ADAPTOR283 PRESSURE GAUGE289 ELBOW,1/2"

293 'P' CLIP294 NUT,M5295 WASHER,M5296 HOSE CONNECTOR,3/4"BSPx3/4"NB297 CONDUIT ADAPTER300 JOINT301 JOINT302 HEX NUT,M12 ZINC PLATED303 HEX NUT M8 ZINC PLATED304 HEX NUT,M16 ZINC PLATED305 HEX NUT,M20 ZINC PLATED306 B.M.S. WASHER, M12 CAD PLATED.307 B.M.S. WASHER, M8 CAD PLATED.308 B.M.S. WASHER, M16 CAD PLATED.309 B.M.S. WASHER, M20 CAD PLATED.320 FILTER SCREEN, ST2A


Page 6-18

ITEM DESCRIPTION321 FILTER SCREEN, ST3A322 FILTER SCREEN, ST4A323 FILTER SCREEN, ST6A325 BALL VALVE 1"BSP326 BALL VALVE 1/2"BSP330 HEX SCREW M6 X 16MM LG ZINC

PLATED331 B.M.S. WASHER, M6 CAD PLATED.335 JOINT340 JOINT-FITTERS CUT341 B.M.S. WASHER, M8 CAD PLATED.342 JOINT-FITTERS CUT350 1/2" BSP BACKING NUT351 BSP BACKING NUT DURAPIPE360 ELBOW,3/4"361 ELBOW,3/4"370 CABLE MARKER NUMBER '3'371 CABLE 2.5MM372 CABLE MARKER LETTER 'U'373 CABLE MARKER LETTER 'V'374 CABLE MARKER LETTER 'W'375 CABLE MARKER NUMBER '4' 376 CABLE MARKER NUMBER '1'377 CABLE MARKER NUMBER '2'378 CABLE MARKER LETTER 'X'379 CABLE MARKER NUMBER '3'380 TERMINAL TAG PANEL


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Electrical Drawings

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