Wedge Gate Valves

Wedge gate valve refers to a valve that opens and closes by moving the opening and closing member (gate) in the vertical direction of the medium flow direction (channel axis). The connection method of wedge gate valve is flange, which is the most common connection method. Wedge gate valve is stable and reliable when used in pipelines, so wedge gate valves are usually used in high-pressure pipelines.

Design specifications

Design standard: API 600, ASME B16.34

Structural length: ASME B16.10

Connection standard: ASME B16.5, ASME B16.47

Pressure test: API 598

Pressure and temperature level: ASME B16.34

Performance parameters

Main material: carbon steel, stainless steel, alloy steel

Nominal diameter: NPS 2″ ~ NPS 48″ DN50~ DN1200

Pressure range: CL150~ CL2500  PN10~ PN420

Working temperature: -196°C~ +600°C

Application range: tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, electricity, shipbuilding, metallurgy, energy system, etc.

Structural features

1. The gate has two sealing surfaces. The most commonly used is that the two sealing surfaces of the gate form a wedge shape. The wedge angle varies with the valve parameters and is usually 5°

2. The sealing principle of the wedge gate valve is to achieve sealing by the close combination of the two sealing surfaces on the wedge gate and the two sealing surfaces on the valve body when they are wedged.

3. The wedge gate valve can be divided into a rising stem gate valve (lifting stem gate valve) and a concealed stem gate valve (rotating stem gate valve) according to the different ways in which the valve stem drives the gate to open and close.

4. The wedge gate valve can be divided into an elastic gate valve and a rigid gate valve according to the different gate structure forms.

5. The valve body is cast, the valve body and the valve cover are connected by bolts, and the middle flange is sealed with a winding gasket. Metal rings can also be used for connection when customers have special requirements.

6. The channel is smooth and the flow coefficient is small. The sealing surface is less eroded and eroded by the medium.

7. The sealing surface is made of alloy steel or hard alloy, which has good wear resistance and abrasion resistance.

8. Adopt flexible graphite packing, reliable sealing, easy and flexible operation.

9. The flow direction of the medium is not restricted, no disturbance, no pressure reduction.

10. Simple shape, short structure length, good manufacturing process, wide range of application.