Pressure Self Sealing Gate Valves

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 mold sealing principle is to achieve sealing by the tight connection between the two sealing surfaces on the wedge-shaped gate and the two sealing surfaces on the valve body when they are wedged.

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

4. The valve body is cast, and the valve body and valve cover are designed with a self-sealing ring structure.

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

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

7. Flexible graphite filler is used, the sealing is reliable, and the operation is light and flexible.

8. The flow direction of the medium is not restricted, there is no disturbance, and the pressure is not reduced.

9. The shape is simple, the structure length is short, the manufacturing process is good, and the application range is wide.

Design specification

Design standard: API 600. ASME B16.34

Structural length: ASME B16.10

Connection standard: ASME B16.5, ASME B16. 25

Pressure test: API 598

Pressure and temperature level: ASME B16.34

Performance parameters

Main body material: carbon steel, stainless steel, alloy steel

Nominal diameter: NPS2″~NPS24″DN50~DN600

Pressure range: CL900~CL 2500 PN160~ 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.