Knife Gate Valves - VM Series | Wey Valves | Full-Lug Isolation
Knife Gate Valves - VM Series | Wey Valves | Full-Lug Isolation

Knife Gate Valves - VΜ Series | Wey Valves

WEY VM Knife Gate Valve – Full-Lug Design

The WEY VM series is a bidirectional full-lug isolation valve for liquids, sludge, slurry, powders and media containing suspended solids. The gate is guided over its full stroke and mechanically supported in the closed position. Flushing corners direct deposits away from the gate guides and back into the flow passage.

Technical Data

  • Nominal sizes: DN50–DN600 / 2″–24″
  • Shut-off pressure: up to 150 psi / approximately 10 bar
  • Flange drilling: ASME/ANSI Class 150
  • Face-to-face dimension: MSS-SP81 / TAPPI
  • Body design: full lug, suitable for dead-end service
  • Body: EN-GJS-400-15 ductile iron
  • Gate: 304 stainless steel; optional 316L
  • Standard seat: NBR/BUNA-N
  • Optional seals: EPDM, FKM or PTFE
  • Stem or piston rod: chrome stainless steel 430F

The mechanically retained round-cord seat provides shut-off along the gate edge. The transverse sealing arrangement controls leakage to atmosphere and can be repacked through lateral screws while the valve remains installed and pressurised. Packing screws must be adjusted uniformly to avoid excessive friction or restricted gate movement.

Actuator Options

  • Handwheel: 2″–16″
  • Bevel gearbox: 6″–24″
  • Pneumatic cylinder: 2″–24″
  • Optional cylinder sizing according to differential pressure and operating time

Applications

Wastewater and sludge, pulp stock, biogas substrates, chemical effluent, bitumen, mining slurry, tailings, cement, lime powder, ash and granular solids.

FAQ

Can the VM be installed at the end of a pipeline?
Yes. The full-lug construction is suitable for dead-end service within the specified shut-off pressure.

Is it suitable for safety functions?
The VM series is SIL 3 capable for open-to-close, low-demand safety functions. Final suitability depends on the complete actuator and control-loop assessment.

Standard (Options)
  • ANSI
Material (Options)
  • ASTM A479 Type 304
  • Ductile Iron
Pressure Rating (Options)
  • 150 lbs
Seat (Options)
  • BUNA-N

Datasheet and documents

Description

The VM knife gate valve is manufactured according to high quality standards, combining a robust design with proven technical features not found in conventional knife gate valves. Thanks to the original, integrated Wey design, it guarantees the best-possible performance and, of course, absolute zero leakage in demanding applications.

Characteristics

  • Nominal sizes: 50 – 600 mm
  • Material: Ductile iron
  • 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 mechanically retained round cord seal creates a bubble-tight shut off on the gate edge.

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.

The gate is mechanically guided over the full stroke.

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.

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.

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 ...

Coal fired power stations

e.g. Coal dust, Coal slurry, Lime powder, Flue ash ...

Waste water treatment plants

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

Cement industry

e.g. Cement, Lime powder ...

Mining

e.g. Coal dust, Mining slurry, Sinter water, Tailings, Acids and phosphates ...

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

PartDuctile iron
BodyDuctile iron
Gate304 Stainless steel
SealBUNA-N
TopworkKohlenstoffstahl
Stem / Piston rod430F

Other materials upon request

Corrosion Protection

BodyEKB Pulverbeschichtung
TopworkEKB Pulverbeschichtung
ScrewsStainless steel

Certificates

SIL 3 Certificate