Multistage Barrel Case Boiler Feed Pumps highest standard ... · Engineering eexcellence - is the core value of Weir Pumps. The Weir multistage barrel pump represents the highest

ExcellentEngineeringSolutions

Weir Pumps Ltd

149 Newlands Road,Cathcart, Glasgow,G44 4EX, Scotland

Tel: +44 141 308 2221Fax: +44 141 308 2255Email: sales @weirpumps.com

Web Site: www.weirclearliquid.com

Engineering excellence - is the corevalue of Weir Pumps.The Weirmultistage barrel case pump representsthe highest design integrity associatedwith this range of pumps. Mechanicaland hydraulic features have beenmodelled using the latest 3D computeraided design technology to ensure thata very high degree of mechanicalreliability is attained. The combination ofstrengths in materials, research anddevelopment, product design andmanufacturing excellence results in arobust, reliable pump with excellentoperability and long life.

WPCLD150

We are constantly endeavouring to improve the performance of our equipment and, as a result, we reserve the right to make alterations from time to time, andequipment may differ from that detailed in this brochure.

Designed &

produced by BRO

THER Edinburgh U

K

Weir: reliably innovative

Weir delivers innovative products. Weir utilises the well-proven “lean productionsystem”. This single flow, lean manufacturing process with dedicated productionunits means less wastage and greater efficiency, so that we can provide you with thehighest standard pump and components.

Multistage Barrel Case Boiler Feed Pumps


UK Regional Sales contactsService and sales coverage:Scotland, North East region, North West region, West Midlands, East Midlands, South West, South East.Tel: +44 141 308 2221 fax: +44 141 308 2255 Email: [email protected]

Weir Pumps Ltd Worldwide Sales contactsAbu Dhabi: Tel: +9712 627 1714 Fax: +9712 627 2793 Email: [email protected]: Tel: +994 12 975389 Fax: +994 12 975391 Email: [email protected]: Tel: +8610 6581 4650 Fax: +8610 6581 3651 Email: [email protected] Cyprus: Tel: +357 2533 4944 Fax: +357 2538 3416 Email: [email protected]: Tel: +9714 883 8581 Fax: +9714 883 8595 Email: [email protected]: Tel: +33 493 515 234 Fax: +33 493 515 234 Email: [email protected]: Tel: +1 570 501 5368 Fax: +1 570 459 2852 Email: [email protected] Kong: Tel: +852 25112062 Fax: +852 25075722 Email: [email protected]: Tel: +1 281 446 6765 Fax: +1 281 446 3952 Email: [email protected]: Tel: +27 11 929 2600 Fax: +27 11 929 2960 Email: [email protected] Lumpur: Tel: +603 209 62805 Fax: +603 209 62811 Email: [email protected]: Tel: +7095 775 0867 Fax: +7095 775 0869 Email: [email protected] Delhi: Tel: +9111 5175 5619 Fax: +9111 5175 5622 Email: [email protected]: Tel: +47 67 592150 Fax: +47 67 592169 Email [email protected]: Tel: +58212 963 8846 Fax: +58212 963 8846 Email: [email protected]: Tel: +65 6735 5597 Fax: +65 6735 5604 Email: [email protected]: Tel: +61 243 492999 Fax: +61 243 492900 Email: [email protected] Tokyo: Tel: +813 5625 5531 Fax: +813 5625 5533 Email: [email protected]: Tel: +905 813 8190 Fax: +905 813 8170 Email: [email protected]: Tel: +3177 3895200 Fax: +3177 3824844 Email: venlo@ weirpumps.com

Increased reliabilityThe Weir “stiff shaft” pump design offers greater reliability, allowing higher operating speeds with fewer stages, and reduces the frequency of pump overhauls.

Simple maintenancePump internals can be replaced in a single working shift.This is made possible by the integration of all components into one cartridge, including seals, bearing housing and pump half coupling.

Secure operationThe Weir design incorporates a full hydraulic balance drum, with generously rated tilting pad thrust bearings to accomodate thrust loads.This allows the pump to operate safely in transient conditions without the risk of seizure or bearing overload.

Quick overhaul“Lift-off” thrust bearing covers allow inspection in situ and replacement without dismantling, while mechanical seals are full cartridges which require no seal setting.

Long lifeOptimised suction inlet guide and impeller designs allow extended erosion free operation.

Easy accessCentreline foot, seal and bearing housing are mounted externally to the main casing, making inspection and maintenance straightforward tasks.

Running clearancesGenerous clearances profiled to maintain efficiency and rotor stiffness.

Higher through life efficiencyOptimum specific speed hydraulics ensure a minimum number of pumping stages, reducing distances between bearing centres and increasing reliability. The impeller design is optimised to reduce pressure pulsationsand vibration.

Reduced auxilliary costs - through thermal shock designThere is no need to supply and install warming through systems for boiler feed applications when utilising the Weir barrel casing pumps, giving higher overall pumping efficiency. Generous internal clearances and axisymetric design ensure ability to withstand thermal shocks.

Save timeAs the main cover studs of the main pump bolts are tightened by hydraulic tensioners - an extremely accurate method of applying the correct stud load - the cartridge can be removed and replaced quickly.

FK RangeMultistage Barrel Case Boiler Feed Pumps

Cartridge PulloutThe FK range has been designed to produce an advancedpump with reduced whole life costs. For example, asillustrated in the cartridge removal sequence on the right, all the pump internals can be withdrawn quickly withoutdisturbing pump alignment or pipework. This helps you to save time and makes maintenance straightforward.

Weir has been designing and manufacturing multistage pumps for manyyears. Our extensive global operating and engineering knowledge hasbeen incorporated in the design of the FK high pressure barrel pump toproduce a world leading best in class product. With features that includefull cartridge withdrawal, optimum efficiency hydraulic design and theinherent ability to withstand thermal shock, the FK range pump offers thelowest through life cost of ownership.

Applications include all boiler feed pump applications and high pressurewater applications including de-scaling.

Specification

Applications:Main and stand-by boiler feed pumps for:• Supercritical power plants• Subcritical power plants• Combined cycle power plants• Cogeneration plants• Industrial/refinery boiler feed

Technical data:• Capacity: up to 2,500 m3/hr• Generated head: up to 4,000 m• Temperature: up to 250 deg C• Speeds: 3,000 , 3,600 and up to

7,000 rpm• Nozzles: Flanged or weld-end

Options:Sealing:• Cartridge mechanical seals as standard• Labyrinth glands• Reheat and superheat attemperation tappings• Upvent/downvent branch combination

Drives:Fixed speed via motor / gearboxVariable speed via: motor / fluid coupling

steam turbineinverter drives

Standard pump materials of construction:• Outer casings: 21/4% chrome• Inner casings: 13% chrome• Impellers /

diffusers: 13% chrome• Shaft: 13% chrome

Related products• End suction booster pumps• Between bearing booster pumps• Vertical canister pumps

Cartridge removal sequence

Flows up to 3000 m3/hr, heads up to 4,000m.Fluid temperatures up to 250 deg C. Materials options include, duplex, 13% chrome stainless steel, 21/4% chrome steel and carbon steels.

Stud removal Remove internal cartridge

Typical drawing only

1000100 200 300 400 500 600 700 800 900 2000 3000

1000

2000

3000

4000

900

300

400

500

700

5000

600

800

H (

Met

res)

Q (Metres /hr)3

Q (US Gallon/Minute)

H (

Feet

)

10000

800 10000

9000

7000

6000

4000

8000

5000

3000

1000

2000

500 600 700 900080007000600050004000300020001000900

Boiler Feed Pump Coverage Chart

Engineering eexcellence - is the core

value of Weir Pumps. The We i r

multistage barrel pump represents

the highest design integrity

associated with this range of

pumps. Mechanical and hydraulic

features have been modelled using

the latest 3D computer aided design

technology to ensure that a very

high degree of mechanical

reliability is attained. The

combination of strengths in

materials, research and

development, product design and

manufacturing excellence results in

a robust, reliable pump with

excellent operability and long life.

WPCLD160-R1

We are constantly endeavouring to improve the performance of our equipment and, as a result, we reserve the right to make alterationsfrom time to time, and equipment may differ from that detailed in this brochure.


Weir delivers innovative products. Weir utilises the well-proven “leanproduction system”. This single flow, lean manufacturing process withdedicated production units means less wastage and greater efficiency, thusproviding the highest standard pump and components. Weir 610 Series Multistage Barrel Case Pumps (BB5)


Weir Pumps Ltd149 Newlands Road, Cathcart, Glasgow, G44 4EX, Scotland.Tel + 44 141 637 7141, Fax + 44 141 637 7358

Email: [email protected] Web: www.weirclearliquid.com

UK Regional Sales contacts

Service and sales coverage:

Scotland, North East region, North West region, West Midlands, East Midlands, South West, South East.

Tel: +44 141 637 7141 Fax: +44 141 637 7358 Email: [email protected]

Weir Pumps Ltd Worldwide Sales contacts


Abu Dhabi: Tel: + 9712 627 1714 Fax: + 9712 627 2793 Email: [email protected] jan: Tel: + 994 12 4975389 Fax: + 994 12 4975391 Email: [email protected]: Tel: + 8610 8528 8336 Fax: + 8610 8528 8376 Email: [email protected] Cyprus: Tel: + 357 2533 4944 Fax: + 357 2538 3416 Email: [email protected]: Tel: + 9714 883 8581 Fax: + 9714 883 8595 Email: [email protected]: Tel: + 33 4 93 63 46 77 Fax: + 33 4 93 63 46 77 Email: [email protected]: Tel: + 15 70 501 5368 Fax: + 15 70 459 2852 Email: [email protected]: Tel: + 12 81 446 6765 Fax: + 12 81 446 3952 Email: [email protected]: Tel: + 27 11 929 2600 Fax: + 27 11 929 2960 Email: [email protected]: Tel: + 7095 967 3453 Fax: + 7095 785 0636 Email: [email protected] Delhi: Tel: + 9111 5175 5619 Fax: + 9111 5175 5622 Email: [email protected]: Tel: + 47 67 592150 Fax: + 47 67 592169 Email: [email protected]: Tel: + 58212 963 8846 Fax: + 58212 963 8846 Email: [email protected]: Tel: + 39 06 3089 6618 Fax: + 39 06 3089 2467 Email: [email protected] Paulo: Tel: + 55 1169 031860 Fax: + 55 1169 031825 Email: [email protected]: Tel: + 8621 6237 5660 Fax: + 8621 6237 5661 Email: [email protected]: Tel: + 65 6276 7117 Fax: + 65 6278 7117 Email: [email protected]: Tel: + 61 243 492999 Fax: + 61 243 492900 Email: [email protected] Tokyo: Tel: + 813 5625 5531 Fax: + 813 5625 5533 Email: [email protected]: Tel: + 905 813 8190 Fax: + 905 813 8170 Email: [email protected]: Tel: + 3177 3895200 Fax: + 3177 3824844 Email: [email protected]

Weir API 610 9th Edition (ISO 13709) BB5Centrifugal multistage barrel case pumps

Barrel ccasing ppumps

Weir ’s vast experience of supplying large multistage barrel pumps to the oil industry

ensures we have an unrivalled installation list and millions of hours operating

experience worldwide. Fully designed to meet with the latest API standards and

incorporating the unique “Shear Ring” technology ensures that the H-OK barrel range

provides optimum reliability to keep your productivity at the highest possible levels.

Applications include main oil line pumps, water injection, produced water injection,

amine duties and shipping pumps.

Specification

Applications:• Crude oil and product pipeline• Sea water injection• Produced water injection• Amine duties

Technical DData:• Capacity: up to 2800m

³/ h r

• Generated head: up to 4100m• Temperature: up to 150 °C• Speeds: 3000, 3600 & up to 7000rpm• Nozzles: Flanged to ANSI B16.5 standard

Options:• Vertical/horizontal mounting• Anti-friction or self-contained hydrodynamic bearings• Single or dual mechanical seals• Unpressurised/pressurised seal system• Studded/flanged/clamp type nozzles• Shear ring (standard)/bolted end cover

(high pressure option)• Cartridge withdrawal equipment

Material ooptions:Casing:

• Carbon steel, 13% Cr stainless steel, • Duplex or superduplex SS

Impellers/diffusers:• 13% Cr stainless steel, duplex or superduplex SS

Shaft:• Carbon steel, 12% Cr stainless steel, superduplex SS

Coating:• Overlaid wear rings available• Also solid tungsten carbide wear rings

available for abrasive applications

Related pproducts:• End suction booster pumps• Between bearing booster pumps• Vertical canister booster pumps

Rapid ccartridge cchange - The mechanicaldesign of Weir barrel case pumps permitsreplacement of pump components within asingle working shift. Our approach tomeeting this requirement has been to fullyintegrate all pump components into onepre-assembled cartridge including seals,bearing housing, pump half-coupling, etcand excluding the barrel only.

Typical drawing only

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Cartridge removal sequenceShear ring removal(cartridge omittedfor clarity)

Vertical arrangement

Remove internalsas a cartridge

Increased ReliabilityThe Weir “stiff shaft” pump designoffers greater rel iabil ity, allowinghigher operating speeds with fewerstages, and reduces the frequency ofpump overhauls.

Save TimeThe Weir ful lcartridge pulloutdesign allows thepump internals,complete withmechanical seals,bearing housings andpump half couplingto be withdrawnquickly from thepump casing.

Higher EfficiencyOptimum specific speedhydraulics ensure a minimumnumber of pumping stages,reducing distances betweenbearing centres and non-contact rotor.

Secure OperationThe Weir design incorporates a full hydraulicbalance drum, with generously rated tiltingpad thrust bearings to accommodate thrustloads. This allows the pump to operate safelyin transient conditions without the risk ofseizure or bearing overload.

Long Component Life - via advanced metallurgyThe environments oil industry equipment operates in are themost demanding in the world. From super duplex stainlesssteels to tungsten carbide overlays Weirs world class inhouseknowledge and experience in both casting and applicationcan ensure that we provide a pump in the metallurgy to suityour application.

Simple MaintenancePump internals can be replaced in a single working shift. This ismade possible by the integration of all components into onecartridge, including seals, bearing housing and pump halfcoupling.

Quick Overhaul“Lift-off” bearing covers allowinspection in situ and replacementwithout dismantling, while mechanicalseals are full cartridges which requireno seal setting.

Minimum Production DowntimeThe unique Weir shear ring designreduces the cartridge change outprocedure time by 70% compared to aconventional bolted end cover option.

Easy AccessSeal and bearing housings aremounted externally to the maincasing, making inspection andmaintenance straightforwardtasks .

Reduced Capital SpendSpace and weight limitations are often important inoffshore installation design. Weir ’s innovativevertical mounting arrangement for the multistagebarrel casing reduces the installed footprint andpump set weight which saves capital investment instructural steel.

Copyright©Weir Pumps Ltd


Designed to simplify maintenanceand reduce whole life costs

Weir pumps are designed to makemaintenance straightforward,minimise operation costs and increaseproduct life span.

The Aquaglide range is developed withthe latest 3D computer aided designtechnology. This design application isintegrated with our manufacturingoperation as well as supplier andcustomer systems. It enables us tospeed up product configuration,reduce the number of parts andoptimise performance.

A thorough analysis of the marketrequirements has resulted in a moreeffective pump which is easier tomaintain, has a lower whole life costand an increased life span.


Weir delivers innovative products. Weir utilises the well-proven ‘lean production system’. This single flow, lean manufacturing process with dedicated production units means lesswastage and greater efficiency, so that we provide you with the highest standard pump and components.

Weir Pumps Ltd149 Newlands Road, Cathcart, Glasgow, G44 4EX, Scotland.Tel + 44 141 637 7141, Fax + 44 141 637 7358

Email: [email protected] Web: www.weirclearliquid.com

UK Regional Sales contacts

Service and sales coverage:

Scotland, North East region, North West region, West Midlands, East Midlands, South West, South East.

Tel: +44 141 637 7141 Fax: +44 141 637 7358 Email: [email protected]

Weir Pumps Ltd Worldwide Sales contacts

Abu Dhabi: Tel: + 9712 627 1714 Fax: + 9712 627 2793 Email: [email protected]: Tel: + 994 12 4975389 Fax: + 994 12 4975391 Email: [email protected]: Tel: + 8610 8528 8336 Fax: + 8610 8528 8376 Email: [email protected] Cyprus: Tel: + 357 2533 4944 Fax: + 357 2538 3416 Email: [email protected]: Tel: + 9714 883 8581 Fax: + 9714 883 8595 Email: [email protected]: Tel: + 33 4 93 63 46 77 Fax: + 33 4 93 63 46 77 Email: [email protected]: Tel: + 15 70 501 5368 Fax: + 15 70 459 2852 Email: [email protected]: Tel: + 12 81 446 6765 Fax: + 12 81 446 3952 Email: [email protected]: Tel: + 27 11 929 2600 Fax: + 27 11 929 2960 Email: [email protected]: Tel: + 7095 967 3453 Fax: + 7095 785 0636 Email: [email protected] Delhi: Tel: + 9111 5175 5619 Fax: + 9111 5175 5622 Email: [email protected]: Tel: + 47 67 592150 Fax: + 47 67 592169 Email: [email protected]: Tel: + 58212 963 8846 Fax: + 58212 963 8846 Email: [email protected]: Tel: + 39 0630 366232 Fax: + 39 0630 366232 Email: [email protected] Paulo: Tel: + 55 1169 031860 Fax: + 55 1169 031825 Email: [email protected]: Tel: + 8621 6237 5660 Fax: + 8621 6237 5661 Email: [email protected]: Tel: + 65 6276 7117 Fax: + 65 6278 7117 Email: [email protected]: Tel: + 61 243 492999 Fax: + 61 243 492900 Email: [email protected] Tokyo: Tel: + 813 5625 5531 Fax: + 813 5625 5533 Email: [email protected]: Tel: + 905 813 8190 Fax: + 905 813 8170 Email: [email protected]: Tel: + 3177 3895200 Fax: + 3177 3824844 Email: [email protected]

Weir 610 Series Multistage Axial Split Case Pumps (BB3)

WPCLD180-R2


WEIR PUMPS LTD.

Submersible Electric Motor Driven Seawater Lift Pump

Technical Description Submersible Motor Technical Description General Weir submersible motors are designed to operate completely submerged in the liquid to be pumped. The installation should be arranged to ensure a minimum of 0.5 ft/sec (0.15m/sec) flow over the motor in order to provide adequate cooling. Motors are designed to be close coupled (1MV3) to the pump and are suitable for continuous running duty (S.1) in accordance with BS4999. The motors are of the 'wet' squirrel cage induction type and are filled with a coolant. Suitable coolant mediums include distilled and potable water. Where it is considered advantageous a heat transfer agent containing a corrosion inhibitor can be utilised which will also reduce the risk of frost damage in situations where this could occur. Stator Assembly The stator windings consist of copper wires insulated with a tough heat resistant plastic material that has a high insulation resistance and is impervious to water. All connections between individual coils and tail cables are insulated and made watertight. The tail cables (power leads) pass through watertight gland in the end cover of the motor. Low-tension windings are normally designed such that the maximum operating temperature will not exceed 70ºC, and high-tension windings are designed for a maximum of 80ºC. In designing the windings, the environmental water temperature is taken into consideration to ensure that the maximum allowable temperature for the insulation type is not exceeded. The core laminations are manufactured from low loss, high permeability, silicon sheet steel and are individually coated with a high grade insulating varnish to prevent eddy current flow between the laminations. These laminations are compressed together between stainless steel endplates (corrosion protection) and solid end clamps and are housed in a closely fitting cylinder. An axial key prevents any rotational movement.

WEIR PUMPS LTD.

Liners are inserted into the slots in the core pack to prevent damage to the winding wire insulation during coil insertion. After winding, the bore of the stator pack is coated with a corrosion preventative paint. Rotor Assembly The rotor shaft is manufactured to fine tolerances from magnetic stainless steel. Austenitic stainless steel sleeves are fitted at the journals in order that these can be replaced, if necessary, during overhaul. The major part of the core pack consists of laminations made from the same material as that used for the stator core. At each end of these laminations a section of stainless steel laminations is included to prevent electrolytic action between the silicon steel core and the copper short circuiting rings, and to counteract any corrosive action of the water at the extremities of the core pack. Slots in the core packing are produced to carefully selected dimensions to ensure an intimate, vibration free fit of the rotor winding bars. Rotor winding bars are un-insulated, medium hard, high conductivity copper and are driven into the core pack then brazed to the short circuiting rings at each end of the core. A tight fit between the bars and coreplates is necessary to prevent undue vibration. A corrosion preventative is applied to the outer diameter of the core and the complete rotating assembly is dynamically balanced. Bearings All bearings are suitable for water lubrication. Guide bearings are housed in the motor end frames. The bushes are carbon impregnated PTFE material. The stainless steel journal sleeves on the rotor assembly are replaceable as previously mentioned. The hydraulic thrust from the pump as well as the weight of the motor and pump rotating elements is borne by a liberally rated thrust bearing. This bearing consists of stainless steel tilting pads mounted on a self-aligning bearing cage and a rotating disc of carbon impregnated PTFE. All components are replaceable and sets of pads do not have to be specially matched for thickness or positional placement. On pump start-up any up-thrust would be taken on a thrust washer in the pump delivery chamber.

WEIR PUMPS LTD.

External Carcass Various material options are available and the choice is dependent on the environmental conditions in which the machine is to operate. The external component materials of construction for this application are identified elsewhere in this tender. Sealing Our motors are fitted as standard, with a cartridge mechanical seal and a diaphragm arrangement to prevent the ingress of the pumped fluid during normal operation. The mechanical seal is mounted on the outer diameter of the rigid sleeve coupling, which is located at the shaft penetration in the motor drive end cover. The sleeve coupling is machined to fine tolerances and is an interference fit on the motor shaft to ensure that no movement can occur between the motor shaft and the coupling. This arrangement also ensures that the motor shaft end is contained in the internal motor coolant circuit, which contains a corrosion inhibitor. The diaphragm is fitted in the bottom motor end cover and is designed to take up expansion and contraction of the motor coolant as it heats and cools which prevents contamination by the pumped fluid. Repeated starting and stopping over a period of many years may result in contamination of the motor coolant by the pumped fluid. In seawater applications, if this is left unchecked, this could cause severe internal corrosion damage. For seawater applications we recommend the use of a coolant header tank in place of the diaphragm, which will ensure the motor always has a positive internal pressure, thus ensuring that no seawater can enter the motor, preventing internal corrosion damage. The header tank also acts as an on-line monitoring device and provides an indication of the condition of the motor mechanical seal. During normal operation, the tank level would remain constant with only a small amount of coolant lost through evaporation or through the seal itself. At the onset of seal failure, the coolant would be lost more rapidly and the tank level would drop. The tank can be fitted with a level switch, which would alert the operator to refill the tank or stop the machine to investigate the coolant loss. Whilst the submersible motor will operate satisfactorily without a header tank, we now recommend the fitting of header tanks to all submersible motors in seawater applications as they can provide a reduction in operating expenditure through the prevention of major corrosion damage and the elimination of unnecessary planned maintenance.

WEIR PUMPS LTD.

Power Cable The supply cable to the submersible electric motor will be of EPR/CSP/GSWB/CSP covered copper construction and will terminate inside the motor casing with cable glands used for sealing at the entry to the casing. The cable will be joined to the motor tails cable by a soldered and tape insulated joint in accordance with our detailed instruction sheets in our factory. Finish The external finish of the motors is dependent on the environmental conditions in which the machine is to operate and the choice of external component materials. If the external surface of the motor is to be painted it will be identified elsewhere in this tender. All motor casing joints are coated with sealant, and where necessary assembled motors are pressure tested. All motors are no load tested prior to performance testing with it’s associated pump. Pumpsets are works tested to ensure that the quoted duties are achieved, witnessed tests with customer's representative present can be arranged, if required, at extra cost. Prior to performance testing in our factory the motors are filled with a 2% solution of corrosion inhibitor, which coats the internal cooling circuit of the motor. After testing the cooling medium is completely drained leaving behind a residual coating over the whole of the internal surfaces. This coating is sufficient to provide adequate corrosion protection and no further treatment is necessary prior to the unit going into service. When installing and commissioning, the motor should be re-filled with potable water in accordance with the procedure in the operating and maintenance manual provided.

WEIR PUMPS LTD.

Pump Technical Description Pump Arrangement The pump offered is of the vertically suspended, submersible motor driven, mixed flow bowl type as typically illustrated and as shown on the attached Typical Sectional Arrangement and General Arrangement Drawings. The pump itself will comprise a strainer suction cover, pump chamber and a rotating element incorporating a shaft mounted impeller. Suction End The suction cover has a flared entry with a spigoted flange suitable for mounting the matched Weir Submersible motor. A perforated strainer of generous proportions screens liquid entering the pump. The liquid being pumped enters the suction cover which has vanes specially designed to provide the impeller with an optimum flow distribution with minimum head loss. The suction cover, which is flanged and spigoted to the first stage chamber, also incorporates a housing for the pump shaft lower cutless rubber bearing bush. Chambers The stage chamber incorporates integral guide passages, designed to guide the liquid smoothly from the outlet of the impeller to the delivery chamber. A neck ring is securely fitted to the suction side of the stage. The pump chamber, suction end cover and delivery chamber all have spigoted/recessed mating faces, the connections being made with studs and nuts, with tab washers provided under the nuts for positive locking purposes. Joints are sealed using nitrile rubber 'O' rings. The delivery chamber also incorporates a housing for a bearing bush, which will guide the upper end of the pump shaft. Rotating Element The rotating element housed in the pump chamber incorporates an assembly of impeller, secured to the shaft by a key. The rest of the shaft is protected by a sleeve and the axial movement of the sleeve and impeller is restrained by means of nuts at the delivery end of the shaft. The impeller is of the shrouded type with vanes hand finished to ensure a smooth passage for the liquid being pumped and are dynamically and statically balanced to permit silent and vibration free running of the rotating element.

WEIR PUMPS LTD.

Hydraulic balance is achieved by relief holes in the delivery shroud and suction and delivery neck flanges are incorporated. This arrangement minimises the thrust on the impellers, hence permitting the use of a smaller thrust bearing in the electric motor. Bearings The thrust bearing will be located in the submersible electric motor. A thrust washer in the delivery chamber limits the upward movement of the shaft when the pump starts under low head conditions. The pump bearings are of the cutless rubber lined type and are lubricated by the water being pumped.

Customer: Shell Offshore Inc Date: 24th May 2006 Project: Ursa / Princess Waterflood Enquiry No: URS-012935- JMM Product: Water Flood Source Pumps Weir Tender No: OC620701/0

Weir Submersible Seawater Lift Design Features.doc

Weir Submersible Electric Motor Design Features Key Features • Water filled motor. • Keyed sleeve coupling between pump and motor. • Coupling mechanically connected to the motor shaft by sealed capscrew. • Cartridge mechanical seal. • Seal fitted on the outside diameter of coupling for ease of maintenance. • Cable connected inside motor and lead to the surface without external wetted joints. • Cable exterior to the riser column. • Optional motor header tank. • Motor has positive internal pressure under all operating conditions when using the

optional header tank. • Material for warm seawater applications duplex stainless steel (‘Zeron 100' UNS

number ‘UNS S32760'). • Optional transit erection cradle. General Mechanical Features 1. The pumpsets are designed for an average of three years’ continuous operation

between major overhauls. The actual time between overhauls is largely dependant on the application and mode of operation; some installations have been in operation for over five years without overhaul.

2. Our motors are designed to run in either direction, therefore upon stopping the

machine; the falling water column will not have any detrimental effect on the pump or motor. However, it is recommended that a short time delay be built into the motor control centre to prevent the motor being re-started whilst it is running in reverse.

Because of the reverse rotation capability of our machine we do not recommend the fitting of a submerged non-return valve above the pump discharge bowl. In the event of stopping the unit, any suspended solids in the water column can settle on top of this valve that could prevent it re-opening on start-up. This would mean that the complete unit would have to be lifted simply to clean the valve. In addition to this, unless the valve has a small drain hole allowing the water column to drain down slowly, when lifting the pump for maintenance the entrained water column has to be lifted as well. This makes maintenance extremely difficult.



3. The Weir submerged electric motor driven pumpset can be supplied in any material

suitable for the application. For raw seawater applications with an ambient seawater temperature in excess of 30oC we would recommend the use of super duplex stainless steel ‘Zeron 100' (UNS S32760).

4. When using a hypochlorite biocide marine growth inhibitor our recommended

dosing rate is 1-2 ppm. 5. Our pumps are supplied with an automatic air release / vacuum breaker valve

situated on the top of the discharge bend. The valve used for most applications is of 50mm nominal bore. An isolating valve is supplied as standard to facilitate servicing of the air release valve whilst the main is under pressure. The isolating valve would be a lever operated wafer butterfly valve.

Alternatively a vertical discharge can be provided with an air release valve supplied loose for mounting at a suitable location in the client’s pipework.

6. The pump journal bearing material is fluted cutless rubber and is designed to

operate submerged in the pumped fluid.

The motor thrust and journal bearing material is carbon loaded PTFE which is lubricated by the motor coolant.

The thrust bearing is designed to carry the thrust load from both the pump and the motor, and is generously sized to accommodate at least 2 x close valve thrust with worn clearances.

7. For seawater applications, as an on-line monitoring device and to prevent internal

corrosion damage, we recommend the use of a coolant header tank, which will ensure the motor, always has a positive internal pressure, thus ensuring that no seawater can enter the motor. The header tank also provides an indication of the condition of the motor mechanical seal.

During normal operation, the tank level would remain constant with only a small amount of coolant lost through evaporation or through the seal itself. At the onset of seal failure, the coolant would be lost more rapidly and the tank level would drop. The tank is fitted with a level switch, which would alert the operator to refill the tank or stop the machine to investigate the coolant loss. The header tank is of the circulating type and is fitted with supply and return lines.



8. The header tank is manufactured in stainless steel and is supplied with reinforced

flexible supply and return hoses with stainless steel connections. 9. For ease of handling we recommend the use of a transit erection cradle when

transporting, installing or maintaining the motor and it associated power cable. This integrated handling device allows the motor and power cable to be transported safely, preventing possible damage and facilitating installation and removal of the unit.

10. The main power cable(s) are clamped to the column pipe above and below the

column pipe flanges. This is achieved by using duplex stainless steel bands with rubber cable protectors. The biocide dosing tube and the header tank supply and return tubes are clipped to the outside diameter of the column pipe flange. The cable bands and tube clips are included in our scope of supply.

11. The recommended start-up sequence, is to start the pump against an open

motorised dump valve with a timer and pressure switch to close the valve after the column is primed and at normal operating pressure. By using a motorised dump valve with a timer and pressure switch, water hammer and pressure surges will be avoided.

General Electrical Features 12. Motors are available in low voltage and high voltage up to 6600 volts. 13. The motors are designed to handle 80% reduced voltage. 14. Stator windings consist of copper wires insulated with a tough heat resistant plastic

material that has a high insulation resistance and is impervious to water. All connections between individual coils and tail cables are insulated and made watertight. The tail cable (power leads) passes through a watertight gland in the end cover of the motor.

Low-tension windings are normally designed such that the maximum operating temperature will not exceed 70ºC; high-tension windings are designed for a maximum of 80ºC. In designing the windings, the environmental water temperature is taken into consideration to ensure that the maximum allowable temperature for the insulation type is not exceeded. Because of the nature of the heat resistant plastic winding insulation on water filled



submersible motors it is not possible to fit winding RTD’s. As an alternative a thermocouple can be fitted in a thermowell located in the internal motor coolant circuit, however this only gives an indication of the general motor operating temperature, not the winding temperature, and is therefore not recommended.

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