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Check Valves

Check valves are designed to prevent return flow by closing automatically through fluid pressure, ensuring unidirectional flow in piping systems.

Available in swing, non-slam, and wafer types, check valves in cast and forged steel are vital in industries like oil and gas, water treatment, and power generation for reliable backflow prevention.

Check Valves

Check valves operate without external control, relying on fluid pressure to open and close, preventing reverse flow that could damage equipment. Swing and non-slam check valves, available in cast and forged steel, are suited for high-pressure systems, while wafer check valves, designed to API 594, offer a compact solution for space-constrained applications. Their robust design and versatile connection options make them essential for maintaining system integrity in critical industrial processes.

Key Properties of Check Valves

  • Backflow Prevention: Automatically closes to stop reverse flow.
  • Versatile Types: Available in swing, non-slam, and wafer configurations.
  • Durability: Cast and forged steel construction for high-pressure systems.
  • Connection Options: Supports RF, RTJ, NPT, and SW connections.

Common Standards and Materials

Check valves are manufactured to meet rigorous industry standards, ensuring performance and compatibility in various systems.

Type/Standard Material Application
Cast Steel: API 600, BS1414, BS1873, BS1868 Carbon Steel, Stainless Steel Oil and gas, power generation
Forged Steel: API 602, BS5352 Carbon Steel, Stainless Steel High-pressure, small-diameter systems
Wafer: API 594, API 598 Carbon Steel, Stainless Steel Compact piping systems

Applications of Check Valves

Check valves are essential in industries requiring reliable backflow prevention:

  • Oil and Gas: Prevents reverse flow in pipelines and refineries.
  • Water Treatment: Protects pumps and systems in distribution networks.
  • Power Generation: Safeguards steam and water systems in power plants.
  • Chemical Processing: Ensures unidirectional flow in processing lines.

Specifications

Properties Values & Limits
Material Cast Steel, Forged Steel
Standards API 600, BS1414, BS1873, BS1868 (Cast); API 602, BS5352 (Forged); API 594, API 598 (Wafer)
Connection RF, RTJ, NPT, SW
Size Range 2" to 56" (Cast); 1/2" to 2" (Forged); 2" to 24" (Wafer)
Pressure Rating Up to ANSI Class 1500 lbs

Considerations for Use

  • Valve Type Selection: Choose swing, non-slam, or wafer based on system requirements.
  • Material Compatibility: Match valve material to fluid and environment to prevent corrosion.
  • Pressure Dynamics: Ensure proper sizing to avoid water hammer in non-slam applications.