Knife Gate Valves - MG Series | Wey Valves | PN16 Service
Knife Gate Valves - MG Series | Wey Valves | PN16 Service

Knife Gate Valves - MG Series | Wey Valves

WEY MG Knife Gate Valve – PN16 Service

The WEY MG series is a bidirectional isolation valve for liquids, sludge, slurry, powders and granular media. It retains the compact EN 558 Series 20 face-to-face dimension while covering operating pressures up to 16 bar. The gate is guided throughout its travel and mechanically supported in the closed position.

Technical Data

  • Nominal sizes: DN50–DN800

  • Operating pressure: up to 16 bar, depending on DN and actuator

  • Flange connections: PN10, PN16, ASME Class 150, BS10-D/E or AS2129-D/E

  • Face-to-face dimension: EN 558 / ISO 5752, Series 20

  • Leakage test: EN 12266-1, Leakage Rate A

  • Body materials: EN-GJS-400-15 or stainless steel 1.4408

  • Gate materials: stainless steel 1.4301, 1.4404 or 1.4462

  • Seat seals: NBR; EPDM, FKM or PTFE options

The body geometry directs deposits back into the flow during opening. The transverse seal limits leakage to atmosphere and can be readjusted through lateral compression screws without removing the valve. Adjustment must be applied evenly to prevent excessive gate friction.

Actuator Options

  • MGA: handwheel or bevel gearbox

  • MGC: double-acting pneumatic cylinder, 6–8 bar

  • MGE: electric actuator

  • MGH: hydraulic cylinder

Applications

Mining slurry, tailings, wastewater, sludge, biogas, pulp, chemical effluent, viscous products, seawater and pneumatic conveying systems.

FAQ

What is the difference between the MG and MF series?
The MG is designed for pressures up to 16 bar, while the MF normally covers applications up to 10 bar.

Can it be installed as an end-of-line valve?
Yes, subject to the applicable PED classification and the reduced allowable pressure specified for end-of-line service.

Standard (Options)
  • DIN
  • ANSI
Material (Options)
  • EN-GJS-400-15 (Nodular Cast Iron)
  • 1.4301
  • 1.4404
  • 1.4408
  • 1.4462
Pressure Rating (Options)
  • PN 10
  • PN 16
Seat (Options)
  • NBR

Datasheet and documents

Description

Knife gate valves with an EN 558/ISO 5752 20 series face to face often quickly reach their pressure limit values of 10 bar – but not our MG series. For the same face to face, it is generally designed for pressures of up to 16 bar. Of course, we retained the many design features that have always set the Wey knife gate valve apart from the competition.

Characteristics

  • Nominal sizes: 50 – 800 mm
  • Material: Stainless steel, Ductile iron, Special material
  • Pressure rating: 0 – 16 bar
  • Flange drilling: PN10, PN16, ANSI Class 150, BS10-D, BS10-E, AS2129-D, AS2129-E
  • Face to face dimension: EN 558 series 20

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.

Most known pipe-cleaning methods (e.g., pigs, brush cylinders, etc.) can be used with the body bore, resulting in minimal pressure drops.

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 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.

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.

Robust 4-post topwork for maximum load and a wide variety of actuator types.

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 non-rising stem in the manual actuator saves space and provides good mechanical power transmission.

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 slurry ...

Pulp and paper industry

e.g. Pulp Stock (Low to high density), Liquor (black, white, green) ...

Water treatment

e.g. Seawater, Saltwater ...

Mining

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

Infrastructure

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

Food and beverage

e.g. Cereal, vegetable, mash, etc., Cocoa beans ...

Waste water treatment plants

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

Material Of Construction

PartDuctile ironStainless Steel
BodyEN-GJS-400-151.4408
Gate1.4301, 1.44621.4404*, 1.4462*
SealNBRNBR
TopworkCarbon steelCarbon steel
Stem / Piston rod1.41041.4104

Other materials upon request  *hard chromed

Corrosion Protection

Body2 Comp. Epoxy-Polyamide Resin Primer, 2 Comp. Polyurethane-Enamel-Top Coat
Topwork2 Comp. Epoxy-Polyamide Resin Primer, 2 Comp. Polyurethane-Enamel-Top Coat