Welded gate valve Description
Welded gate valve is a shut-off valve that is directly connected to the pipeline using a welded interface. The gate plate is lifted and lowered perpendicular to the fluid direction to achieve medium opening and closing control. It is suitable for industrial pipeline systems with high temperature, high pressure or strict sealing requirements. Its core functions include:
Forced sealing: The gate plate and the valve seat form a tight seal through mechanical pressure or medium pressure, and the leakage rate is as low as API 598 Class IV standard;
High-efficiency on-off: When fully opened, the gate plate is completely separated from the flow channel, and the flow resistance coefficient can be as low as 0.08, reducing the energy consumption of medium transportation.
Features
Simple structure: The design of the welded gate valve is relatively simple, and it is easy to manufacture and maintain.
Good sealing: Due to the welding connection, the welded gate valve and the pipeline form a whole, which improves the sealing performance of the system.
Small working stroke: The welded gate valve has a short working stroke and a short opening and closing time, which can respond quickly to operational needs.
Low friction: The friction between the sealing surfaces is small, which helps to extend the service life of the valve.
High temperature and high pressure resistance: Some types of welded gate valves (such as Z60Y high temperature and high pressure welded gate valves) can withstand temperatures up to 600°C and pressures of 100MPa, and are suitable for fluid control in extreme environments.
Wide range of application: Welded gate valves are widely used in industries such as petroleum, chemical, electric power, metallurgy, water treatment, etc., especially in situations where high sealing and corrosion resistance are required.
Welded gate valve Specification
| Parameters | Value range/characteristics |
|---|---|
| Nominal pressure | PN10-PN420 (up to Class 2500) |
| Applicable temperature | -29℃~570℃(Special model P57170V) |
| Diameter range | DN50-DN1200(common DN100-DN600) |
| Applicable media | Petroleum, high temperature steam, corrosive chemical fluids, etc. |
Welded gate valve
Advantages of gate valves with other connection forms
| Comparison dimensions | Welded gate valve | Flanged gate valve |
|---|---|---|
| Sealing reliability | Welding eliminates flange leakage points, reducing leakage risk by 90% | Relies on flange gasket sealing, susceptible to thermal deformation |
| Pressure resistance | Supports up to PN420 ultra-high pressure | Usually limited to PN100 or below |
| Maintenance cost | No bolt tightening required, installation efficiency increased by 50% | Bolts need to be tightened regularly and gaskets replaced |
Welded gate valves have become core pipeline control equipment in the fields of petrochemicals, electric power and special industries due to their high structural strength and excellent sealing performance.
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