Knife Gate Valves - VS Series | Wey Valves | Stainless Steel
Knife Gate Valves - VS Series | Wey Valves | Stainless Steel

Knife Gate Valves - VS Series | Wey Valves

WEY VS Knife Gate Valve – Stainless Steel Semi-Lug Design

The WEY VS series is a bidirectional semi-lug isolation valve for corrosive liquids, slurry, sludge, viscous products and media containing suspended solids. The gate is mechanically guided throughout its travel and supported in the closed position. The body geometry directs accumulated material away from the guide area during opening.

Technical Data

  • Nominal sizes: DN50–DN900

  • Flange connections: ASME Class 150

  • Face-to-face dimension: MSS-SP81 / TAPPI

  • Isolation pressure: 150 psi for 2″–8″, 90 psi for 10″–12″ and 60 psi for 14″–24″

  • Body material: cast 316 stainless steel

  • Gate material: hard chrome-plated 316 stainless steel

  • Standard seat seal: Aflas

  • Stem or piston rod: stainless steel 430F

The transverse sealing system limits leakage to atmosphere and can be readjusted through lateral compression screws without removing the valve. Adjustment must be uniform to prevent excessive gate friction.

Actuator Options

  • Handwheel

  • Bevel gearbox

  • Pneumatic cylinder

  • Hydraulic cylinder

  • Electric actuator

  • Quick-action lever, depending on configuration

Applications

Chemical effluent, bitumen, pulp, bleaching chemicals, sludge, biogas, seawater, syrups, juices and granular process media.

FAQ

Can the VS be installed as an end-of-line valve?
Yes, provided the flange arrangement and reduced allowable end-of-line pressure are verified for the selected size.

Is the VS suitable for safety functions?
The series can be configured for SIL-capable open-to-close safety functions, subject to the actuator, instrumentation and final system assessment.

Standard (Options)
  • ANSI
Material (Options)
  • AISI 316 (Stainless Steel)
Pressure Rating (Options)
  • 150 lbs
Seat (Options)
  • Aflas (Metal seat)

Datasheet and documents

Description

The appeal of the VS series lies in its ingenious semi-lug design. The lightweight construction of this knife gate valve, which is available in stainless steel, makes it very cost-effective. Nonetheless, it gives our customers the highest level of reliability and durability in use. This is also because – like all Wey products – it can be repacked at any time and ensures zero leakage while in use.

Characteristics

  • Nominal sizes: 50 – 900 mm
  • Material: Stainless steel, Special material
  • Pressure rating: 0 – 10 bar
  • Flange drilling: ANSI Class 150
  • Face to face dimension: MSS-SP81

Details

The robust metal yoke enables the optimal, simple assembly of mechanical or inductive limit switches. The yoke can be removed from one side. This makes it easier to access the mechanical parts.

The robust metal yoke enables the optimal, simple assembly of mechanical or inductive limit switches. The yoke can be removed from one side. This makes it easier to access the mechanical parts.

The robust metal yoke enables the optimal, simple assembly of mechanical or inductive limit switches. The yoke can be removed from one side. This makes it easier to access the mechanical parts.

A unique transverse seal, consisting of a transverse seal profile and packing compound, makes the body bubble-tight towards the atmosphere.

The robust metal yoke enables the optimal, simple assembly of mechanical or inductive limit switches. The yoke can be removed from one side. This makes it easier to access the mechanical parts.

The transverse seal can be repacked at any time and under full pressure using the lateral packing screws.

The robust metal yoke enables the optimal, simple assembly of mechanical or inductive limit switches. The yoke can be removed from one side. This makes it easier to access the mechanical parts.

With its optimized gate geometry, accumulated media is pushed out of the gate guide and flushed out into the bore by the increased flow.

The robust metal yoke enables the optimal, simple assembly of mechanical or inductive limit switches. The yoke can be removed from one side. This makes it easier to access the mechanical parts.

In the closed end position, the gate is also mechanically supported.

Application Areas

Biogas plants

e.g. Food waste, Household waste, Wood chips, Manure, Substrates, Other renewable resources ...

Chemical and petrochemical industries

e.g. Viscous pastes, Granulates, Chemically contaminated waste water, Bitumen/tar ...

Food and beverage

e.g. Syrups, juices and beverages, Cereal, vegetable, mash, etc., Processed fruits, Cheese powder, Cocoa beans ...

Waste water treatment plants

e.g. Waste water, Raw water, Sludge, Digested sludge, Floating sludge ...

Infrastructure

e.g. Waste water, Rainwater, Industrial water, Mixed water ...

Pulp and paper industry

e.g. Pulp Stock (Low to high density), Liquor (black, white, green), Chemical solutions, bleaching agents, Recycling tissue ...

Water treatment

e.g. Seawater, Saltwater ...

Material Of Construction

PartStainless Steel
Body316 Stainless steel
Gate316 Stainless steel
SealAflas
TopworkCarbon steel
Stem / Piston rod430F

Other materials upon request

Corrosion Protection

BodyEKB powder coat
TopworkEKB powder coat
ScrewsStainless steel

Certificates

SIL 3 Certificate

EU Certificat CE mark