Download pdf - Dams, ReseRvoiRs anD HyDRopoweR solutions - · PDF filedams, reservoirs and ... Dams ReseRvoiRs anD HyDRopoweR solutions Glenfield, based in ... This welding, in some cases, can be

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Dams, ReseRvoiRsanD HyDRopoweR solutions

2 | Dams, ReseRvoiRs anD HyDRopoweR

GlenfielD Glenfield was established back in 1852 and as such is one of the most experienced valve manufacturers in the World.

Since the world leading AVK Group acquired Glenfield in 2001, design and technologies from other acquired UK valve manufacturers (ie Bestobell / Blakeborough, Guest & Chrimes/Saint Gobain) have been incorporated into Glenfield's product offer.

Major investments during 2005/06 have ensured Glenfield can meet the ever increasing requirements from the global water industry.

Today Glenfield is AVK Group's specialist manufacturing company for pressure/flow control valves (automatic and non-automatic design), large diameter gate and butterfly valves, non-slam recoil and conventional check valves, air valves, ball float valves etc.

To assist partners with local after sales service, project follow up, approvals with local utilities etc., Glenfield have Product Specialist Engineers in the following areas: UK, India, China, South East Asia, Middle East and Australia.

Glenfield work with it’s sister companies around the world to offer a wide range of products. For dams, reservoirs and hydropower projects, Glenfield cooperates with ORBINOX Valve International in Spain to provide full valve solutions.

ORBINOX offer high quality products such as radial gate, bonneted gate and roller gate valves together with fabricated penstocks. Full details of the ORBINOX company can be found at www.orbinox.com. Like Glenfield, ORBINOX have a wealth of experience in this market segment and by working together provide valve solutions ensuring the optimization of design, type and size of valves required.

For technical or product support relating to valve selection, please contact either Greg Morris; [email protected] or Enrique Jauregui; [email protected].

Member of the group

Dams, ReseRvoiRs anD HyDRopoweR | 3

GlenfielDDams ReseRvoiRs anD

HyDRopoweR solutions

Glenfield, based in Scotland, are a valve company with considerable experience and expertise in supplying valves and valve solutions to global water and sewage systems.

Supplying valves since 1867 Glenfield continue to offer an extensive product range with valve sizes ranging from DN25 to DN3000.

Dams and Reservoirs is one of the key market segments with over a 100 years involvement.Glenfield control valves are installed in well over 100 dams around the world and continue to be a highly rated supplier of valve products and solutions for dams, reservoirs and hydro power projects.

Also within the range are specialist terminal discharge valves which provide accurate flow control as well as excellent energy dissipating characteristics.

These discharge valves can be used for a number of applications such as emergency drawdown, compensation / ecological flow, flood control, pressure relief and also for turbine bypass flow in hydroelectric power installations.

Because of the nature of these projects, flexibility in product design is highly important and Glenfield work closely with customers to ensure that the optimal valve size and type is chosen for each application.

Glenfield also offers supervisory support for valve installation and commissioning on products and are available to discuss any requirements.

Tel.: +44 (0)1563 521150

www.glenfield.co.uk


Glenfield have been designing and supplying Free Discharge and Fixed Cone Valves since the 1950’s. These valves have been developed from extensive in-house laboratory testing and thorough field investigations. These tests confirmed that an odd number of ribs effectively dampens vibrations that are found in other fixed cone designs.

Fixed cone valves are used to pass a controlled amount of water downstream with no damage to the immediate surroundings due to its fantastic energy dissipating characteristics. These valves also offer an effective method of aeration due to atmospheric dispersion.

The valve body is designed to operate with minimum vibration over its full stroke and uses multiple, specially shaped aerodynamically designed ribs leading to a downstream cone.

The outlet cone ensures that discharge is in the form of a hollow expanding jet, which is ideal for energy dissipation as the water is spread over a rapidly increasing surface area, thus permitting effective atmospheric cushioning. If containment of the jet is desired, a hood can be installed downstream of the valve.

The valve is manufactured from ductile iron. The sleeve is made from stainless steel and uses upstream and downstream seals to ensure drop-tight shutoff. Operation of the valve sleeve is via twin screwed spindles, worm gearboxes, intermediate rods and a double bevel input gearbox. Actuating gear may be manually, electrically or hydraulically operated.

The one piece cast unit is an important feature of this valve type in order to minimise vibrations and help provide maximum discharge. Other brands of Fabricated or welded FDV’s may require numerous welds along the full length of the ribs, connection to the cone and flanges etc. This welding, in some cases, can be detrimental to the core material.

seRies 857 fRee DiscHaRGe valves(fDv)


seRies 857 fRee DiscHaRGe valves

components1. Valve body2. Seal retaining ring3. Guide strips4. Seal5. Lifting brackets6. Shafts7. Operating spindles8. Couplings9. Support foot10. Lubricators11. Worm gearbox12. Double bevel gearbox

materialDuctile iron EN1563 EN-GJS.500/7 Ductile iron EN1563 EN-GJS.500/7Aluminium bronze EN12163 SW307GResilient SteelStainless steel EN10088Stainless steel EN10088MiscellaneousDuctile iron EN1563 EN-GJS.500/7MiscellaneousMiscellaneousMiscellaneous

Ref nos.

857-0200-11110000857-0300-11110000857-0400-11110000857-0450-11110000857-0600-11110000857-0700-11110000857-0800-11110000857-0900-11110000857-1000-11110000857-1200-11110000857-1400-11110000857-1500-11110000857-1800-11110000857-1900-11110000857-2200-11110000

Dn

200300400450600700800900

1000120014001500180019002200

a

613762

1055104313531524162016762025213423152415263028033347

B

203273381381457550533610720838916916

124512451350

c

460500600600852807780883880

100012461288132014602051

D

430600

1060106012601410148515641905243025902240278026803492

approx weight

500800120012001500190020002700380045006000650095001120015300


The size of the valve is determined by the required flow rates at the minimum net head at the valve. The net head is measured from the minimum upstream water surface to the centre line of the valve, less any friction losses from the conduit.

The graph below can be used as a general guide for valve size selection. Please contact Glenfield Valves for final valve selection

seRies 857 fRee DiscHaRGe valve sizinG

The equation to determine discharge is:

Q = Cd A√2gH

Where :Q = Flow Discharge (m3 /s)C

d = Discharge coefficient of valve in fully open position without hood (0.83)

A = Area of valve based on nominal valve diameter (m2)H = Net head (m)


There are a number of important features and benefits when using the FDV, these include:

seRies 857 fRee DiscHaRGe valve

featuRes & Benefits

featuRes

• Terminal Siting • Free discharge• Resilient seal• External operating mechanism• Cylindrical geometry • Low head loss characteristics • Single piece cast construction • Atmospheric dispersion

Benefits

• Low civil building costs• No cavitation• Drop tight closure• Simple and effective maintenance• Hydraulic balance with low operating torque• Maximum flow discharge potential• Rigidity and strength• Maximum energy dissipation / Minimum erosion


seRies 857 fRee DiscHaRGe valve specificationThe FDV is designed for terminal regulating duties and shut-off applications under free discharge conditions.

Assembly of valve comprises body, sleeve, seal retaining ring, operating screws and nuts, worm and double bevel gear units, face and back end seals, intermediate drive shafts and universal couplings.

valve BoDy Is a cylindrical single piece casting from Ductile Iron BS EN1563 GJS 500/7, with a flange at the inlet, faced and drilled to specific requirements (BS EN1092-2). The downstream end is formed as an inverted cone cast integral with, and attached to, the cylinder by integral radial ribs.

The outer edge of the ribs and adjacent body sections are faced with extruded bronze strips of length to suit control sleeve travel.

Facings are provided at the upstream end to carry the worm gear units on the horizontal centre-line and the double bevel drive on top of the valve. A support foot is situated adjacent to the inlet flange on the underside of the valve.

valve sleeve Is a fabricated assembly comprising stainless steel cylinder and side brackets on which are mounted the operating nuts. The bore has a fine machined finish on which the back end sealing ring makes the sliding contact throughout the full length of the valve travel. The downstream end is chamfered to mate with the face seal and provides droptight contact in the closed position.

valve seals. The back end seal is housed in a body recess adjacent to the upstream end of the valve ports and provides sealing contact with the bore of the sleeve through the full valve travel. The face seal is located between the downstream end of the body and a ductile iron retaining ring, thus providing a combination of resilient seal and positive stop with the end of the valve sleeve in the closed position. Both seals are formed from extruded or moulded rubber sections, sized and formed to suit.

valve opeRatinG GeaR Controls axial movement of the sleeve, when covering or uncovering the body ports, comprising of:-

Two operating nuts, mounted on side brackets of the sleeve, threaded to match the mating operating screws which are protected by resilient gaiters.

Each screw is keyed at the back end, to a worm gear unit mounted to the upstream end of the valve body.

The drive is taken from each side of the valve via the worm gear units, up to the double bevel unit mounted on top of the body, by steel intermediate shafts and totally enclosed universal couplings. The worm and double bevel gear units are all totally enclosed grease filled assemblies, designed for long periods of maintenance free service.

The valve assembly can be operated by electrical actuator coupled direct to, or alternatively remote from, the double bevel unit input shaft.

For smaller valves (DN200 & 300), operation of the valve is by a lever/ crank mechanism which can be connected to a manual gearbox or electrical actuator.


seRies 857 selecteD GloBal RefeRence list

oRDeR yeaR

1955195519581959196019611963196319651966196719671968197319741976197619791980198119841985199019912002200220022002200320032003200320032004200520062007200820082008200820092009201020102011201220132013201420142014

Dn

210012009001200180090090014001500180075022004001100750900110011006009003003004501400140010007004001200450 &12009004004501200&190012006001000600200300300140060010001200200300 & 12009002200900900300

customeR

N.O.S.H.E.B.Govt. of IndiaC.E.G.B.C.E.G.B.N.O.S.H.E.B.Commonwealth Dept. of WorksGovt. of Hong Kong Swaziland Elec. BoardGovt. of TanzaniaCeb. Fed. of MalayaDundee CorporationI.N.O.S.Mid Scotland Water BoardGovt. of Hong Kong Auckland Reg. AuthorityWyoming City CLNorthumbrian W.A.Nigerian W.A. Isle of Man W.B.Govt. of New ZealandSri Lanka W.S.U.A.E.Cyprus W.D.D.Malaysia W.B.Govt. of Malaysia Govt. of Malaysia Govt. of PanamaGovt. of PanamaGovt. of Malaysia Government of IranGovernment of MalaysiaGovernment of MalaysiaGovernment of MalaysiaSnowy Hydro, AustraliaGovernment of IranGovernment of SarawakGovernment of IranSydney Catchment AuthoritySydney Catchment AuthoritySydney Catchment AuthoritySydney Catchment AuthorityAVK PhilippinesAVK AustraliaAVK MalaysiaAVK UKHydroPlanSino Hydro, BruneiAVK IndiaAVK MalaysiaScottish WaterWelsh WaterSpecialist Maintenance Contractors

location

Ericht Dam (Scotland)Madupatty Dam (India)Stwlan Dam (Wales)Dinas Dam (England)Monar Dam (Scotland)Upper Cotter Dam (Australia)Plover Cove(Hong Kong)Edwaleni Dam (South Africa)Nyumba-Ya-Mungu Dam (Tanzania)Batang Padang (Malaya)Backwater Dam (Scotland)Ocumarito Dam (Venezuela)Longhill Weir (Scotland)High IslandMangatangi Dam (New Zealand)Greybull Valley Irr Project (USA)Kielder DamOyan River DamSulby ReservoirCosseys DamKotemale DamKhor FakkanS. ConveyorLinggu DamSungai Selangor Jus DamChiriqui Dam (Esti.)Barrigon Dam (Esti.)Chereh DamAydogmoosh DamKelalong DamSungai Kesang DamSungai MuarJindabyne DamVanyar DamGerugu DamGheighaj DamTallowa DamCordeaux DamNepean DamBroughtons pass DamAngat dam - Manilla WaterMardi DamSungai TeriangAbberton ReservoirRannoch DamUlu Tutong DamWilson DamPedu DamBackwater DamYstradfellte ReservoirSymvoulos Dam (Cyprus)


Glenfield have been designing and successfully supplying Submerged Discharge Valves since the 1960’s. The valve and corresponding sump sizing were developed from extensive laboratory testing and field investigations.

The SDV is always used in the terminal position of the system. One of the key advantages it has over other terminal discharge valves has the combination of a compact stilling sump to assist with kinetic energy dissipation in a quiet fashion and, at the same time, provides a tranquil water surface in the sump. Because the jet velocity of the partially closed valve can be excessive, cavitation can occur as the jet leaves the valve. However, as the jet disperses in the body of water in the sump surrounding the valve, any cavitation under severe flows is quite innocuous as the implosions are directed away from the valve.

In common with so many of the best engineered products, the basic valve form is simple. It consists of an inlet pipe bend and a vertical down pipe terminated by the valve outlet and base plate. Flow is regulated by the vertical movement of an internal cylindrical sleeve operated by a central spindle.

The valve operates on the principle of throttling pressure across multiple ports (or orifices) which are specially sized, shaped and positioned around a circular sleeve. The design of the optimized port area and geometry is based on the hydraulic consideration of each specific site. Energy is dissipated in the water immediately surrounding the submerged part of the valve.

This valve, in ductile iron construction, is suitable for flow control and energy dissipation over a wide range of flows and pressures throughout its full travel and is not subject to vibration and cavitation.

The vertical moving stainless steel sleeve uncovers the customised ports in the bronze body thus creating a horizontal radial existing jet. The large porting shapes help to minimize potential port plugging from any contamination / debris contained within the medium.

The sleeve is operated by a central vertical spindle rising through a sealed gland in the inlet bend.

seRies 856 suBmeRGeD DiscHaRGe valves (sDv)


components1. Baseplate2. Upper valve body3. Stopper pipe4. Guide spider5. Tapper pipe (if required)6. Inlet bend7. Flange gasket8. Pillar9. Extension pipe (if required)10. Ported body11. Sleeve12. Operating spindle13. Gearbox14. Stuffing box

materialDuctile iron EN1563 EN-GJS.500/7 Ductile iron EN1563 EN-GJS.500/7Ductile iron EN1563 EN-GJS.500/7 Ductile iron EN1563 EN-GJS.500/7Ductile iron EN1563 EN-GJS.500/7 Ductile iron EN1563 EN-GJS.500/7EPDMDuctile iron EN1563 EN-GJS.500/7 Ductile iron EN1563 EN-GJS.500/7BronzeStainless steelStainless steelMiscellaneousDuctile iron EN1563 EN-GJS.500/7

Ref nos.

856-0200-01101000856-0300-11101000856-0300-01101000856-0400-11101000856-0400-01101000856-0450-11101000856-0600-11101000856-0600-01101000856-0800-11101000856-0800-01101000856-1000-11101000856-1000-01101000856-1200-11101000856-1400-11101000856-1600-21101000856-1800-21101000

Dn inlet

200300300400400450600600800800

100010001200140016001800

Dn outlet

200250300300400400450600600800800

10001000120012001400

min Height (m)

1.251.891.362.301.702.303.112.463.863.074.523.455.156.707.099.80

a (mm)

260400400500500550700700900900

110011001300127013001370

approx weight (Kg)

1000130015002200250030004500500070007500

120001250019000200002100023000

max. Discharge capacity (i/s)

200450450750750950170017003000300047504750680092001200015250


The flow velocity in the inlet bend should be limited to 6m/s and the flow velocity in the vertical section of the valve should be limited to 12m/s. A larger elbow can be used with a smaller downstream valve to provide the desired maximum flow rate.

The headloss characteristics for standard ported valves are shown in the curves below (please note that the porting design of the valve can be modified to achieve a near-linear flow control across the valve stroke and that this will modify the headloss curves below – please contact Glenfield for a more detailed analysis of your requirements Tel.: +44 (0)1563 521150 )

seRies 856 suBmeRGeD DiscHaRGe valves sizinG


The design of the stilling sump (or chamber) is crucial for the optimization of energy dissipation. Dimensions from the valve to the stilling sump wall are critical. Please contact Glenfield for stilling sump dimensions to suit your application. The following calculations and graphs can be used as a guideline for stilling sump requirements:

seRies 856 suBmeRGeD DiscHaRGe

valves stillinG sump

Where:Q = maximum discharge flow (m3/s)H = maximum head of water (m)d = minimum submergence depth (m)S = side length of sump wall (m)

The uniformity of free surface conditions in the stilling well can be improved by the addition of short corner fillets. The diagram below can be used as a guideline for sizing and positioning of the fillets.


featuRes

• Stilling Sump• Resilient Seal• External Mechanism• Submerged Discharge • Ported Sleeve• Cylindrical Sleeve• Rising Stem Design• Cast Construction• Fine Screw Thread

Benefits

• Compact energy dissipation • Droptight Shut Off• Simple Maintenance• Quiet, Safe, Cavitation Free• Near Linear Flow Control• Low Operating Effort• Improved Visual Indication• Minimum Vibration • Smooth Flow Transition

seRies 856 suBmeRGeD DiscHaRGe valve featuRes & BenefitsThere are a number of important features and benefits when using the SDV these include:

1. Valve Stress Analysis 2. Valve Design

3. Valve Manufacture 4. Valve installation & commissioning


seRies 856 suBmeRGeD DiscHaRGe valve

specificationThe Series 856 SDV is designed to control the discharge of water at the reservoir inlet or terminal point of a pipe or dam, discharging into a compact stilling sump.

The vertical sleeve type, regulating valve is designed primarily to present an optimum means of controlling flow under submerged discharge conditions. Jet energy is dissipated in the turbulence of the water immediately surrounding the submerged part of the valve.

The basic assembly of the valve comprises of the following components:

inlet BenDDuctile iron cast, double flanged 90° bend. The inlet flange is drilled to requirements. The bend incorporates a stuffing box gland and mounting flange facing to take the support pillar/ thrust tube. External bosses are cast on the bend for fixation of suitable lifting eyebolts.

GuiDe spiDeRsDuctile iron cast, flange with a centrally located boss which is attached to the flange by integrally cast radial ribs. The spiders are fitted with bronze bushes to aid support and alignment of the valve spindle. The top face of the flange has a spigot and the bottom face recessed for location purposes. Both faces sealed by means of resilient cord joints. The boss and ribs require to be streamlined to reduce flow disturbance.

tapeR pipe (foR unequal inlet / outlet size valve)Ductile iron cast, double flanged concentric taper which is located between the two guide spiders. The top flange has a spigot and the bottom flange is recessed for location purposes. Both faces sealed by means of resilient cord joints.

extension pipe (DepenDinG on RequiReD HeiGHt of valve)Ductile iron cast, double flanged pipe which is located between the guide spider on the taper pipe and the guide spider on the stopper pipe, provides the required height between inlet bore centreline and the base of the sump.

stoppeR pipeDuctile iron cast, double flanged pipe, with four internal stopper pads integrally cast to limit the travel of the sliding sleeve. Located at the lower end of the stopper pipe are two openings faced, studded and provided with cast hand-hole covers / gaskets, which can be removed to allow inspection of the valve internals.

uppeR valve BoDyDuctile iron cast, double flanged pipe, with its top portion machined to accommodate the gland and guide rings and dynamically activated resilient sealing ring. The upper valve body top flange has a spigot and cord joint and is bolted to the stopper pipe. The bottom flange is recessed to suit the contour of the cord joint on the ported body.

poRteD BoDyBronze cast cylindrical component which has external bosses cast, and has the required porting equally spaced between the bosses. The ports are specially designed to provide suitable flow control for the conditions specified. The top face of the ported body has a spigot which is located in the upper valve body and the bore of the lower part of the ported body is machined to suit the contour of the resilient face ring.

Base plateDuctile iron casting having its top end cast solid with the underside having internal radial ribs each of which has a rectangular shaped hole adjacent to the solid end. These holes allow passage of grout between the ribs, the grout being introduced through tapped holes inside of the cylinder portion.

Through this flange, the foundation bolts are located offset from equally spaced bosses, which are on the same centreline as the ribs.The top surface of the base plate is machined to accept the ported body and to suit the contour of the resilient face ring.

The ported body is secured to the baseplate by means of stainless steel stay bars through the upper valve body flange held in place by stainless steel nuts.

Resilient face RinGA rubber face ring is securely clamped in position between a check formed on top of the baseplate and a check in the lower end of ported body and clamped by stay bars as previously described.


sleeveA stainless steel fabrication with a centrally located inner boss connected with radial ribs. The outside diameter of the sleeve is accurately machined and is a close fit in the ported body. The sleeve is guided by means of bronze ring located in the upper valve body.

The resilient sealing ring, also located in the upper valve body, is pressurised by the passage of water through a series of holes in a retaininggunmetal gland ring, to ensure positive contact with the sliding sleeve thus forming a seal which is effective at all positions of valve travel.

In the closed position, the lower or leading edge of the sleeve makes contact with the rubber face ring which is secured between ported body and baseplate as previously described.

In the open position the sleeve is raised to expose the full area of the ports.

opeRatinG spinDleIs stainless steel and the rising spindle type. It comprises of sections (dependent on valve length) valve spindle, extension spindle and a screwed headstock spindle. The sections are machined at the ends to make them suitable for joining together. The lower end of the valve spindle is secured to the stainless steel valve sleeve by a shoulder formed on the spindle, bearing on the top of the centrally located boss.A stainless steel lifting nut is screwed to the bottom end of the spindle and bears on the underside of the boss and so locks the spindle to the sleeve. The valve spindle can be extended.

HeaDstocK pilllaRDuctile iron cast pillar which is mounted onto the inlet bend. The height is adjusted to position the handwheel at a convenient height above the operating platform. Two hand hole openings are provided for access to the gland and stuffing box and two machined slots are provided for engagement of the torque plate.

valve contRol equipmentThe valve can be operated by either manual or electrical means.

seRies 856 suBmeRGeD DiscHaRGe valve specification

component

Inlet bendGuide spider

Taper pipeExtension pipe

Stopper pipeUpper valve body

Base plateSupport pillar

Stuffing boxPorted body

SleeveSpindle

SealsFasteners

Guide bushStay bars

mateRial

Ductile Iron BS EN1563 EN-GJS-500-7 Ductile Iron BS EN1563 EN-GJS-500-7Ductile Iron BS EN1563 EN-GJS-500-7Ductile Iron BS EN1563 EN-GJS-500-7Ductile Iron BS EN1563 EN-GJS-500-7Ductile Iron BS EN1563 EN-GJS-500-7Ductile Iron BS EN1563 EN-GJS-500-7Ductile Iron BS EN1563 EN-GJS-500-7Ductile Iron BS EN1563 EN-GJS-500-7Aluminium Bronze BS EN1982 CC333GStainless Steel BS EN10088 1.4401Stainless Steel BS EN10088 1.4057Resilient Stainless Steel A2 / A4Aluminium Bronze BS EN1982 CW307GStainless Steel BS EN10088 1.4057


oRDeR yeaR

19681968196919691969197019701972197419751976197619781978197919801980198119821983198519861986198819881988198919891990199219931993199719992002200320042005200520062006200620062007200720082009200920112011201220132013201320142014

Dimension

36/3624/1872/7224/1830/3030/2418/1530”/600mm800/600mm42/421000/8001200/1067450/400450/450800/800300/300400/300800/600800/8001000/1000200/200600/600400/4001200/1200600/6001200/1200900/800300/3001200/1000800/600600/6001600/1200400/300800/6001000/800375/250800/6001000/8001400/1200400/300400/300450/400400/300600/450800/6001000/8001000/800300/30040/3218/16200/200400/250300/2501000/800600/4501400/1200

seRies 856 selecteD GloBal RefeRence list

customeR

Central Scotland W.B.East Scotland W.B.Dept. of Water AffairsRoss & Cromarty Water BoardCentral Scotland W.B.E.S.B. DublinAyrshire & Bute W.B.Auckland R. Auth.Farid Ahmar & Farouk At-tar Sir M. MacDonald & Part. (Cons.Eng)Ward Ashcroft & ParkmanWelsh National W.D.A.Northumbrian W.A.North West W.A.Central Scotland W.B.Lothian Reg. CouncilSouthern W.A.U.A.E.Government of CyprusKenya Water Dept.Government of NigeriaGovernment of U.A.E.Algiers W.S.Government of Hong KongGovernment of Hong KongGovernment of ThailandGovernment of BruneiGovernment of Hong KongStrathclyde W.A.Goverment of SingaporeNorth West WaterBombay Municipal CorporationGovernment of Hong KongGovernment of ZimbabweGovernment of MalaysiaSydney Catchment AuthoritySydney Catchment AuthoritySnowy Hydro, AustraliaGovernment of IranGovernment of Hong KongGovernment of UAEGovernment of AustraliaGovernment of EthiopiaGovernment of AustraliaGovernment of IranGovernment of AustraliaMelbourne WaterGovernment of MalaysiaAlstom / EDFGovt. Of CaliforniaGovt. Of CaliforniaFred Olsen / HydroplanAVK AustraliaBristol WaterWatercare, New ZealandSinohydro, MalaysiaJN Bentley, UK

location

Glen Hove (Scotland)Backwater Dam (Scotland)Orange River (S. Africa)Invergordon (Scotland)Gowanbank (Scotland)Turlough Hill (Ireland)Loch Bradan (Scotland)Wairoa Dam (New Zealand)Mandali Irrig. Project (Iraq)Kangimi Res. (Nigeria)Marchlyn ReservoirKeilder DamHigh Lane Res.BlairlinnansMegget DamDarwell/BeauportAl Ain Wed 24 PumpAsprokremmos DamChania ThikaBalanga DamKhor Fakkan DamGue De ConstantineHarbour IslandHarbour Island Sch.Lat Phrao DamBenutan DamAu Tau P.S.Afton Res.Pak Kong T.W.Shap AqueductPanjrapur Pumping StationTai Po Tau Pumping StationOdzani SchemeSungai KelinchiWoronora DamWoronora DamJindabyne DamTangab DamLower Shing MunShobaisi DamGoro Nickel ProjectKoga DamMooney Mooney DamGheighaj DamPalmtree CreekSugarloaf ReservoirKargu DamRizzanese Dam, CorsicaCitrus ReservoirCitrus ReservoirBurnhead 2 (UK)Onkaparinga DamHeron GreenHunua No. 4Hulu TerengganuEccup Reservoir


The Series 756 butterfly valve is a double eccentric, resilient seal design. These valves are used for general isolation purposes, or as protection valves or turbine inlet valves for hydropower applications.

The standard valve complies with EN1074 Parts 1 & 2 and is manufactured from ductile iron with plate disc design and integral seat.

These valves have a number of key features and benefits as follows:

• Tilted disc design reduces seal wear, increases longevity and minimises operating torques.• Pin and disc fixation ensures anti-flutter and reduction in wear. Safety key mounted as extra back-up.• Replaceable stainless steel seat ring to increase abrasion resistance during initial opening of valve.• Flow through disc design provides less sensitivity to cavitation at high flow velocities (available for DN700 – 1200 sizes)• Disc seal optimization for reliable functionality due to secure fixation in the correct position.• Protected shaft end zones for maximum corrosion protection• Locking device providing possibility of locking the disc in the fully open or closed position• Valves are fully bi-directional as standard• Hydraulic opening / gravity weight closing for fast closure of valve to protect the system from emergency flow rates caused by pipe bursts etc.

seRies 756 laRGe DiameteR ButteRfly valves

700800900

1000120014001500160018002000220024002800

700700700700700700700700700700700700700

430470510550630710750790870950

103011101270

127156186216269333363390448521576676752

133162192222275339369396454527582682758

550620690770855970

1070114512201382148215841783

435513563628743843913965

10651180127813821590

641711791871956

11191219129413981560164117531943

533627722816986

11821274135915401753192621262470

543636730824993

11891281136615471760193221322476

449449499499571571571606721747764764764

52366988111201683247730063473421757558760

1152015500

DN D(mm)

L(mm)

L1(mm)

L2(mm)

H2(mm)

W1(mm)

W2(mm)

W3(mm)

W4(mm)

W5(mm)

Approx. Mass(kg)


ceRtificates

enquiRy cHecK listIn order to ensure that your enquiry can be processed as quickly and accurately as possible, it is important that the following information is provided to allow us to correctly select the optimum valve type and size for your specific application:

1. Maximum flow rate = ________m3/s2. Minimum flow rate = ________m3/s3. Maximum pressure head at valve = _______m4. Minimum net pressure head at valve* = _______m5. Method of operation = manual or electrical6. Any other information that is relevant to the enquiry

*Net pressure head is the height difference between the minimum upstream water surface and the centerline level of the valve bore minus any system headlosses.

contactGReG moRRisGlobal Dams & Reservoirs ManagerDirect: +44 1563 545614Mobile: +44 (0) 7810377246Email: [email protected]

Glenfield’s design quality is based on exceptional historic engineering detail and thorough research of the customers' needs. Glenfield products have been manufactured in Scotland for over 100 years using experienced personnel and equipment to ensure high precision and uniformity.

The overall framework for quality from development to distribution is our extensive quality assurance system.

DaviD wanGTechnical Sales Manager (China)Direct: +86 21 5789 1222Mobile: +86 135 1204 0770Email: [email protected]

HaRman sinGHTechnical Sales Manager (India)Direct: +91 (0) 8151 324 743Mobile: +44 (0) 9888 45 8031/9465 65 0657Email: [email protected]

Kelvin fooTechnical Sales Manager (South East Asia)Direct: +603 3290 6717/6714Mobile: +6012 309 3682Email: [email protected]

associateD pRoDuctsSeries 55

Large Diameter Gate Valves

Series 265/30 Dismantling

Joint

Series 859 Pressure Relief

Valve

This is a small example of products offered by Glenfield, for the full range please visit www.glenfield.co.uk

Tel.: +44 (0)1563 521150Fax.: +44 (0)1563 545616 [email protected]

DR&HS JAN 2015Copyright©Glenfield A/S 2015

Glenfield Valves LtdQueens Drive, Kilmarnock, KA1 3XF, Ayrshire, United Kingdom

www.glenfield.co.uk

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