Structural features:
1. The gate has two sealing surfaces, and the most commonly used one is that the two sealing surfaces of the gate form a wedge shape. The wedge angle varies with the valve parameters, usually 5 °.
2. The sealing principle of wedge gate valve is achieved by the tight combination of the two sealing surfaces on the wedge gate plate and the two sealing surfaces on the valve body when wedged in.
3. Wedge gate valves can be divided into rising stem gate valves (lifting stem gate valves) and rising stem gate valves (rotating stem gate valves) based on the different ways in which the valve stem drives the gate to open and close.
4. Wedge gate valves can be divided into elastic gate valves and rigid gate valves based on the different structural forms of the gate plates.
5. The valve body is cast, and the valve body and valve cover are connected by bolts. The middle flange is sealed with a spiral wound gasket. When customers have special requirements, metal rings can also be used for connection.
6. Smooth channel with low flow coefficient. The sealing surface is less susceptible to erosion and erosion by the medium.
7. The sealing surface is made of alloy steel or hard alloy, which has good wear resistance and scratch resistance.
8. Using flexible graphite filler, reliable sealing, and easy and flexible operation.
9. The flow direction of the medium is not restricted, does not disturb flow, and does not reduce pressure.
10. Simple shape, short structural length, good manufacturing process, and wide applicability.
Design specifications:
Design standards: API 600, ASME B16.34, GB/T 12234
Structural length: ASME B16.10, GB/T 12221
Connection standards: ASME B16.5, ASME B16.47, GB/T 9113, JB/T 79, HG/T 20592
Pressure test: API 598, GB/T 13927, GB/T 26480, JB/T 9092
Pressure and temperature rating: ASME B16.34, GB/T 12224
Performance parameters:
Main materials: carbon steel, stainless steel, alloy steel
Nominal diameter: NPS 2 "to NPS 64", DN50 to DN1600
Pressure range: CL150~CL2500 PN10~PN420
Working temperature: -196 ℃~+600 ℃
Application scope: tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electricity, shipbuilding, metallurgy, energy systems, etc.
