industrial check valve Description
Industrial check valve is an automatic valve used in industrial pipeline systems to prevent medium backflow. It realizes one-way flow control through the deadweight of the valve disc, medium pressure or spring force to ensure equipment safety and process stability. Its core functions include:
Prevent medium backflow: block the reverse flow of fluid to avoid risks such as pump reversal and pipeline water hammer effect;
Automatic opening and closing: No external power is required, and the valve disc movement is realized by relying on fluid pressure and mechanical structure.
Main types and structural characteristics
| type | feature | application |
|---|---|---|
| Lift check valve | The valve disc slides along the vertical center line of the valve body, with strong sealing and large resistance | High-pressure, small-diameter pipelines (such as chemical reactor outlets) |
| Swing check valve | The valve disc rotates around the shaft, with large flow capacity, suitable for low flow rate and large diameter pipelines | Oil and natural gas pipelines |
| Butterfly check valve | The valve disc is a butterfly-shaped structure with small size and light weight, and needs to be installed horizontally. | HVAC system, water treatment network |
| Ball type reversing check valve | The spherical valve disc has strong self-cleaning ability on the sealing surface and is resistant to erosion by particle media. | Lubrication systems for ore dressing plants and chemical plants |
| Silent Check Valve | Install a buffer device to reduce the impact noise of the valve disc, suitable for noise-sensitive scenes | Building water supply and drainage, precision equipment supporting |
industrial check valve specification
Valve sizes: 1/2-36" (DN15-DN900)
Pressure: ANSI class 150-2500 (PN16-PN420)
Temperature: -196 to 500°C
Body materials: cast iron,carbon steel, stainless steel, alloy steel and duplex steel
Trim (disc/stem): cast iron,carbon steel, stainless steel, duplex steel and alloy steel
Design: ASME 16.34/API 6D/API 600/BS 1868
Face-to-face: ASME B16.10
End flange: ASME B16.5, ASME B16.47
BW end: ASME B16.25
Test: API 598/API 6D/BS 6755
Special: NACE MR-01-75
industrial check valve
Applications
Energy and Chemical Industry: Prevent backflow of high-temperature and high-pressure media (such as steam pipes and reactor outlets); Water Treatment System: Prevent water backflow after the pump is shut down and cause idling damage; Pharmaceutical/Food: Sanitary stainless steel material is suitable for sterile environment to prevent cross contamination; Mining and Metallurgy: Ball-type reversing check valves are used for pipeline control of high-wear and particle-containing media.
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