National Standard Gate Valve

Product overview:

A gate valve is a valve in which the closing element (valve disc) moves along the centerline of the valve seat. Due to this movement of the valve disc, the change in the valve seat opening is directly proportional to the valve disc stroke. Because this type of valve has a relatively short stem opening or closing stroke and a very reliable shut-off function, and because the change in the valve seat opening is directly proportional to the valve disc stroke, it is very suitable for flow regulation. Therefore, this type of valve is ideal for shut-off, regulation, and throttling applications.

Product parameters:

Size range: 1/2"-16" (DN15-DN400)

Pressure rating: ASME 150~2500LB (PN16~PN420) Temperature range: -46℃ -600℃

Connection methods: flange, welding, threaded, etc.

Main materials: carbon steel, stainless steel, duplex steel, alloy steel, etc.

Sealing surface hardening treatment method: Stellite alloy and nickel-based alloy overlay welding

Operation methods: manual, electric, pneumatic, etc.

Product standards:

Design Standard: GB/T12235

Structural length: GB/T12221

Connection flange: GB/T9124

Testing and inspection: GB/T26480

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Product Details

Features:

1. Gate valves are suitable for pipelines with nominal pressure of 1.6~42.0MPa (Class 150~2500) and working temperature ≤600℃ in various working conditions such as petroleum, chemical, and thermal power plants, to cut off or connect the pipeline medium.

2. The stop valve has a short valve core switching stroke and the sealing surface can withstand multiple switching, making it very suitable for applications requiring frequent switching. During opening and closing, the friction between the valve core and the valve seat sealing surface is small, making it more wear-resistant. It also has a good manufacturing process and is easy to maintain.

3. The sealing surface is overlaid with Co-based hard alloy, which has good wear resistance, corrosion resistance, scratch resistance and long service life.

4. The valve stem undergoes quenching and tempering and surface nitriding treatment, giving it excellent corrosion resistance and scratch resistance.

5. Nominal pressure ≥15.0MPa (Class 900) The cavity adopts a self-tightening sealing structure, and the sealing performance is enhanced as the pressure increases, thus ensuring the sealing performance.

6. The valve is equipped with an inverted sealing structure and the sealing is reliable.

7. The materials of the parts and the dimensions of the flanges and butt weld ends can be reasonably selected according to the actual working conditions or user requirements to meet various engineering needs.

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