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WEY Knife Gate Valve Type VN 2.4.00

zertifi

ertes

Qualitt

ssys

tem

ISO

9001

EN2900

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Reg-N

r.

1100

1-01

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The WEY Knife Gate Valvetype VN provides unchangedreliability at economical cost!

The unique WEY sealing system for high performance

duties:

The WEY Knife Gate Valve type VN is built to highquality manufacturing standards and combines ruggedconstruction with time-tested design refinementsfound in no other knife gate valve. This unique valvedesign assures long-life reliability and bubble-tightshut-off due to the joint action of various factors duringthe closing stage.

Tight shut-off due to the sealing function on thelateral gate side. Fine surface ground finish of thegate ensures smooth operation and long-life sealperformance. Mechanically retained seal preventspull-out.

Gate guides on full stroke length ensure flutter-and noisefree operation and bi-directional bubble-tight shut-off at full design pressure in combinati-on with above sealing features.

During final closing stage, remaining solids aresheared off by knife-like gate and body cuttingedge.

Special gate geometry prevents jamming duringclosure because deposits are pushed ahead by thegate into enlarged flushing corners of the body.Contoured body interior initiates flushing action toprevent build-up and jamming of deposits in seatarea.

Unique WEY transverse seal eliminates stuffingbox. A special lip-seal profile ensures for no leaka-ge to atmosphere. Diamond shaped, compressedsealing compound provides necessary sealingpressure, compensates for wear and stands foroutstanding service life performance under nor-mal conditions.

Minimized chest area between port and trans-verse seal leaves no space for solid build-up orjamming.

By tightening packing screws or inserting sealingcompound pellets, repacking under full pressureand without system shut-down is always possible.Considerable time/cost savings in maintenancework persuaded customers for decades to installWEY Knife Gate Valves.

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Additional features

Solid steel topwork

provides maximumstrength, partialdisassembly ofsupport for easyaccess to mechanicalparts, and facilitatesmounting of: mechanical or

proximity limitswitches

solenoid valves

Non-rising stemdesign (VNA) savesspace and offersshielded stem, stemnut operation.

The cushioned (shut)pneumatical cylinder(VNC) preventspressure shocks andinitiates flushingaction.

As an option pneu-matic cylinder can besupplied with ma-gnet piston design,

together with proxi-mity-magnet end-switches directly mo-unted on cylinder.

Topwork is designedin accordance tolatest EuropeanHuman Safety Regu-lations.

Epoxy powdercoating EKB for bodyand topwork withstainless steel

screws provideexcellent corrosionprotection.

Semi-lug type designprovides for easeof installation andpermits dead-endservice.

Full bore openingeffects low pressuredrop and permitsthe use of all knownpigging devices (e.g.

spherical, cylindrical,brush pigs, etc.)

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Service

Process

Viscous Paste, Colloids, Granulates, Chemical Waste,Textile Slurry, Pellets, Powders

Food and BeverageFruit Pulps, Grain Mash and Spent Grain Mash,Corn Slurry

Power Generation and MiningMill Scale, Coal Dust and Slurry, Mine Slurry,Lime Slurry, Cement Dust

Municipal

Raw Sewage, Sewer Sludge, Waste Water with solids,etc.

Pulp and PaperPaper stock thru all consistencies, Pulp/Watermixtures, Black Liquor, Waste Paper, Rags, Wood Pulp

SugarBeet and Cane Sugar, Syrup, Juice

Temperature

40C to 400C with adequate material- and construction adaption.

Corrosion protection

Standard

Body EKB coating (Epoxy powder), black RAL 9005Topwork EKB coating (Epoxy powder), red similar RAL 3020Handwheel EKB coating (Epoxy powder), black RAL 9005Screws Screws in stainless steel

Remark: Stainless steel parts without coating

Material construction

Description Cast Iron Construction Stainless steel Construction AccessoriesStandard Option Standard Option

Body EN-JL1040 316SS Limit switches mechanicalGate 304SS 316L, 304L 316L* 316Ti* and proximity,Seal NBR FPM, EPDM, PTFE NBR FPM, EPDM, PTFE Solenoid valves,Topwork Steel 316L Steel 316L Vee-notch,Stem/Piston rod Cr-Steel 316L Cr-Steel 316L Positioner

AISI430F AISI430F

* hard chromed

Other materials upon request

Construction details

Application

Size Nominal Flange Test acc. Face-to-faceDN pressure PN drilling50 150 10 bar PN 16 EN-12266-1 EN 558-1/ISO 5752200 10 bar PN 10 rate A part 20250 300 6 bar PN 10350 400 4 bar PN 10500 1400** 4 bar PN 10

** from size DN 500 pillar topwork according to type MFEN-JL1040 only available up to size DN 400

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Type VNCWEY Knife Gate Valve withpneumatic cylinder

Type VNEWEY Knife Gate Valve withelectric actuator

Stem extensionAll VN Type Knife Gate Valves can be supplied with stem/piston rod extension tosuit site construction.

Actuator options

Type VNA

WEY Knife Gate Valve with handwheel

Type VNB

WEY Knife Gate Valve with quickaction lever

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Further products

WEY Sluice Gates WEY Off-center Butterfly Valves

WEY Check Valves (dirty water) WEY Check Valves (clean water)

Centric Butterfly Valves WEY Dismantling pieces

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