Knife Gate Valves - W Series | Wey Valves | Full-Flange Design
Knife Gate Valves - W Series | Wey Valves | Full-Flange Design

Knife Gate Valves - W Series | Wey Valves

WEY W Knife Gate Valve – Heavy-Duty Full-Flange Design

The WEY W series is a bidirectional full-flange isolation valve for high differential pressures and abrasive or corrosive process media. The gate is guided throughout its travel and mechanically supported in the closed position. The body geometry directs solids away from the guide areas and back into the flow passage.

Technical Data

  • Nominal sizes: DN50–DN1400

  • Operating pressure: up to 50 bar, depending on model and DN

  • Flange connections: ASME Class 150 or Class 300

  • Face-to-face dimensions: MSS-SP135, short or long pattern

  • Body materials: Ni-Resist, ductile Ni-Resist, carbon steel or stainless steel

  • Gate material: heat-treated 17-4 PH stainless steel

  • Seat seals: GFLT or Aflas, depending on medium and temperature

  • Replaceable wear rings: Ni-Hard, tool steel or ceramic

The mechanically retained seat limits displacement under high flow velocity and solids loading. The transverse sealing arrangement includes gate scrapers and can be readjusted through lateral compression screws while the valve remains installed.

Actuator Options

  • Handwheel

  • Bevel gearbox

  • Pneumatic cylinder

  • Hydraulic cylinder

  • Electric actuator

Actuator thrust is determined by nominal diameter, differential pressure, solids concentration, friction conditions and required operating time.

Applications

Mining slurry, tailings, process water, mineral concentrates, oil sands and pipelines exposed to severe abrasion. Carbide or polyurethane internal coatings may be specified according to particle size and wear rate.

FAQ

What is the difference between W0, W1, W2 and W3?
W0 and W1 use Class 150 flange drilling, while W2 and W3 use Class 300 drilling. Allowable isolation pressure depends on DN, actuator and face-to-face configuration.

How is the valve construction selected?
Selection requires operating pressure, temperature, solids concentration, particle size, corrosiveness, cycle frequency and required fail position.

Standard (Options)
  • ANSI
Material (Options)
  • Carbon Steel
  • Ni-Resist Iron
  • Ductile Ni-Resist
Pressure Rating (Options)
  • 150 lbs
  • 300 lbs
Seat (Options)
  • GFLT

Datasheet and documents

Description

Whether an application is referred to as “severe service”, “high performance”, or “heavy duty”, we have overcome the corresponding challenges with our Wey design. We pushed it to the limit, and the result is the W series. It offers the greatest flexibility, including for the range of nominal sizes, materials, and pressures. It opens up an incredible scope of application. With the W series, we guarantee that we will outperform the competition, no matter what the situation.

Characteristics

  • Nominal sizes: 50 – 1400 mm
  • Material: Stainless steel, Carbon steel, Cast tin-bronze , Cast aluminum-bronze
  • Pressure rating: 0 – 50 bar
  • Flange drilling: ANSI Class 150, ANSI Class 300
  • Face to face dimension: MSS-SP135 Class 150 short, MSS-SP135 Class 150 long, MSS-SP135 Class 300 short, MSS-SP135 Class 300 long

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 universal bonnet can be used for a wide variety of actuator types. Many different add-on parts can be easily fitted.

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.

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.

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.

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 flange threads make assembly considerably easier, while also allowing for dead-end installation.

Application Areas

Mining

e.g. Mining slurry, Sinter water, Tailings, Process minerals, ...

Material Of Construction

Part
BodyNi-ResistDuctile Ni-ResistCarbon Steel
Gate17.4 PH17.4 PH17.4 PH
SealGFLTAflasGFLT
TopworkCarbon steelCarbon steelCarbon Steel
Stem / Piston rod430 Chrome Steel17.4 PH Steel430 Chrome Steel

Other materials upon request  

Corrosion Protection

BodyEcoat
TopworkEpoxy Powder Coat, Stainless steel
ScrewsB4, Stainless, B7

Certificates

SIL 3 Certificate

EU Certificate CE mark