KNIFE GATE VALVES

Equipped with the unique Wey sealing system, our knife gate valves are suitable for the most demanding of applications. They can handle a variety of differential pressure scenarios and abrasive and corrosive materials, not to mention extreme temperatures. They are available in different materials and come with multiple options.

Knife Gate Valve

Features Wey knife gate valves

50 –
2000 mm

Nominal size
100 mbar abs. –
100 bar

Pressure rating
more than
100

Material options

Product series

All products
Knife gate valves
Butterfly valves
Control gates
Standards
Standards
DIN
ANSI
mm
inch
bar
psi
Design
Check valve
Centric butterfly valve
Double eccentric butterfly valve
Sluice gate
Stop log
Stop gate

Case shape
Wafer type body
Lug type body
Double flange body

Nominal sizes
0 mm
25 mm
32 mm
40 mm
50 mm
65 mm
80 mm
100 mm
125 mm
150 mm
200 mm
250 mm
300 mm
350 mm
400 mm
450 mm
500 mm
600 mm
650 mm
700 mm
750 mm
800 mm
900 mm
1000 mm
1050 mm
1200 mm
1400 mm
1500 mm
1600 mm
1800 mm
2000 mm
2500 mm


Material
Stainless steel
Cast iron
Ductile iron
Cast steel
Austenitic cast iron
Carbon steel
Cast tin-bronze
Cast aluminum-bronze
Cast aluminium
Special material

Pressure rating
0 bar
1 bar
2 bar
2.5 bar
3 bar
4 bar
10 bar
16 bar
25 bar
50 bar
100 bar


Flange drilling
PN6
PN10
PN16
PN25
PN40
PN63
PN100
ANSI Class 150
ANSI Class 300
ANSI Class 600
BS10-D
BS10-E
AS2129-D
AS2129-E
DIN 11864-2
Special flange

Face to face dimension
EN 558 series 13
EN 558 series 14
EN 558 series 16
EN 558 series 20
EN 558 series 48
MSS-SP81
MSS-SP135 Class 150 short
MSS-SP135 Class 150 long
MSS-SP135 Class 300 short
MSS-SP135 Class 300 long
Special length

Width
0 mm
100 mm
150 mm
200 mm
400 mm
500 mm
800 mm
1000 mm
1200 mm
2000 mm
3000 mm
5000 mm
6000 mm
6400 mm


Height
0
300
400
500
1000
1500
1800
2000
2500
3000
3500
4000
5000

Head of water
0 m
0.15 m
1.20 m
4 m
5 m
6 m
15 m


Adjustable height
0
500
1000
1500
2000
2500
3000

Channel width
0
300
400
500
1000
1500
2000

reset filter

VN Series

Knife gate valves VN Series
Design: Case shape: Nominal sizes: 50 – 1400 mm Material: Stainless steel, Cast iron, Special material Pressure rating: 0 – 10 bar Flange drilling: PN10, BS10-D, BS10-E, AS2129-D, AS2129-E Face to face dimension: EN 558 series 20 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm VN Series

VS Series

Knife gate valves VS Series
Design: Case shape: 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 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm VS Series

VG Series

Knife gate valves VG Series
Design: Case shape: Nominal sizes: 150 – 200 mm Material: Cast iron Pressure rating: 0 – 4 bar Flange drilling: Special flange Face to face dimension: EN 558 series 20 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm VG Series

VL Series

Knife gate valves VL Series
Design: Case shape: 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 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm VL Series

VM Series

Knife gate valves VM Series
Design: Case shape: Nominal sizes: 50 – 600 mm Material: Ductile iron Pressure rating: 0 – 10 bar Flange drilling: ANSI Class 150 Face to face dimension: MSS-SP81 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm VM Series

MF Series

Knife gate valves MF Series
Design: Case shape: Nominal sizes: 50 – 2000 mm Material: Cast iron, Ductile iron Pressure rating: 0 – 10 bar Flange drilling: PN6, PN10, PN16, ANSI Class 150, BS10-D, BS10-E, AS2129-D, AS2129-E Face to face dimension: EN 558 series 20 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm MF Series

MG Series

Knife gate valves MG Series
Design: Case shape: 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 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm MG Series

MH Series

Knife gate valves MH Series
Design: Case shape: Nominal sizes: 100 – 400 mm Material: Stainless steel, Ductile iron, Special material Pressure rating: 0 – 25 bar Flange drilling: PN25, ANSI Class 150, ANSI Class 300 Face to face dimension: EN 558 series 16 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm MH Series

W Series

Knife gate valves W Series
Design: Case shape: 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 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm W Series

DB Series

Knife gate valves DB Series
Design: Case shape: Nominal sizes: 80 – 750 mm Material: Stainless steel, Special material Pressure rating: 0 – 10 bar Flange drilling: ANSI Class 150 Face to face dimension: Special length Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm DB Series

DP Series

Knife gate valves DP Series
Design: Case shape: Nominal sizes: 50 – 400 mm Material: Stainless steel, Cast iron, Ductile iron, Cast steel, Special material Pressure rating: 0 – 25 bar Flange drilling: PN10, PN16, PN25, ANSI Class 150 Face to face dimension: EN 558 series 20, Special length Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm DP Series

HD Series

Knife gate valves HD Series
Design: Case shape: Nominal sizes: 80 – 400 mm Material: Stainless steel, Cast steel Pressure rating: 0 – 100 bar Flange drilling: PN40, PN63, PN100, ANSI Class 600 Face to face dimension: Special length Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm HD Series

HSI Series

Knife gate valves HSI Series
Design: Case shape: Nominal sizes: 65 – 400 mm Material: Stainless steel Pressure rating: 0 – 16 bar Flange drilling: PN16, ANSI Class 150, DIN 11864-2 Face to face dimension: Special length Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm HSI Series

TI3 Series

Knife gate valves TI3 Series
Design: Case shape: Nominal sizes: 80 mm Material: Stainless steel Pressure rating: 0 – 10 bar Flange drilling: ANSI Class 150 Face to face dimension: MSS-SP81 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm TI3 Series

VK Series

Knife gate valves VK Series
Design: Case shape: Nominal sizes: 200 – 1000 mm Material: Stainless steel, Cast iron, Special material Pressure rating: 0 – 2.5 bar Flange drilling: Special flange Face to face dimension: Special length Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm VK Series

SG Series

Knife gate valves SG Series
Design: Case shape: Nominal sizes: 50 – 650 mm Material: Cast steel, Special material Pressure rating: 0 – 10 bar Flange drilling: ANSI Class 150 Face to face dimension: MSS-SP81 Width: mm Height: mm Head of water: m Adjustable height: mm Channel width: mm SG Series

Basic knowledge: knife gate valves

Knife gate valves are used to control the flow of media containing solids in pipelines. The valve is installed in a pipeline. When actuated, a gate reduces the flow or closes the passage. High pressures often act against the gate and the body, depending on the application for which the valve is used.

Possible areas of application are, for example, in wastewater treatment, the chemical industry, the pulp and paper industry or in biogas plants. Unlike butterfly valves or ball valves, knife gate valves are ideal for contaminated, solids-laden, viscous or sticky media.

APPLICATIONS

FAQ

Do Wey knife gate valves have a preferred flow direction?

Most Wey knife gate valves are bidirectionally tight, meaning they seal in both flow and pressure directions. However, there is a flow direction where the gate is optimally supported by the body of the valve. For details, refer to the respective instruction manual of the product.

For which applications are Wey knife gate valves suitable?

Our knife gate valves are used in a wide variety of industries and for a wide variety of applications: Be it in the treatment of wastewater, the extraction of biogas from liquid manure, in mining or in chemical plants.

For which media can Wey knife gate valves be used?

Wey knife gate valves can be used for almost all types of media, whether liquid, gaseous or solid. Even viscous or sticky substances, fine powders, acidic liquids or media containing large solids are no problem with the right knife gate valve.

For which temperatures can Wey knife gate valves be used?

Wey knife gate valves can be used for medium temperatures from 0 °C up to 400 °C, depending on the type of valve.

Are ATEX-compliant Wey knife gate valves available?

Yes, most of our knife gate valves are also available in ATEX-compliant versions.

Can Wey knife gate valves be used as end-of-line valves?

Yes, there are Wey knife gate valves that can be used as end-of-line valve without a mating or loose flange. For more information, please contact our sales team or read the instruction manual.

In which nominal sizes are Wey knife gate valves available?

Wey knife gate valves cover all common nominal sizes from DN 50 mm, 100 mm and 150 mm up to DN 2000 mm.

What materials are Wey knife gate valves made of?

We use more than 100 materials for our knife gate valves, including, for example, cast iron, ductile iron and stainless steel. For demanding applications, we use particularly corrosion-resistant materials, such as super duplex steel or titanium. In addition, there are a variety of possible coatings, such as PTFE or tungsten carbide, which provide additional protection for the material if required.

For which flange connections are Wey knife gate valves available?

Wey knife gate valves are available in all common DIN and ANSI flange drillings. They are also available in BS and AS, as well as with special flange.

What are the face-to-face dimensions of Wey knife gate valves?

Wey knife gate valves have the common EN and MSS face-to-face dimensions.

What types of actuators are available for Wey knife gate valves?

Depending on the valve, we offer single-acting and double-acting pneumatic cylinders, electric actuators, hydraulic cylinders, as well as handwheel-driven, bevel gear-driven, lever-driven and electrohydraulic actuators.

Are Wey knife gate valves also available as custom-made products?

Yes, our knife gate valves are always customized to the individual application. For particularly demanding applications we also design completely new special knife gate valves.

Where are Wey knife gate valves manufactured?

We have two production plants: Our headquarters in Switzerland and a subsidiary in the US. Our knife gate valves for the DIN markets are manufactured in Switzerland, while our ANSI knife gate valves are partly manufactured in Switzerland and partly in the US.

How are Wey knife gate valves tested?

Every single knife gate valve that leaves our plant is first tested for tightness in accordance with DIN EN 12266-1/2. In addition, the functionality of each actuator is tested with pressure tests to open and close the valve.

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