Flange double door check valve, also known as double door or dual plate check valves, are widely used in various applications, including oil and gas, water treatment, and industrial processes.

Here are some common types:

1. Wafer Type Double Door Check Valve

  • Design: Compact and lightweight, these valves are sandwiched between two flanges.
  • Application: Ideal for installations with limited space; commonly used in water and wastewater applications.

2. Flanged Double Door Check Valve

  • Design: Features flanges for bolting directly to piping systems.
  • Application: Suitable for larger pipelines and high-pressure applications, offering robust sealing and flow control.

3. Spring-Loaded Double Door Check Valve

  • Design: Incorporates a spring mechanism to assist with valve closure, ensuring a tighter seal.
  • Application: Useful in applications where backflow prevention is critical, such as in pump discharge lines.

4. Lift Type Double Door Check Valve

  • Design: The doors lift off their seats to allow flow, relying on gravity and flow velocity for closure.
  • Application: Commonly used in horizontal installations where flow is consistent.

5. Silent Check Valve

  • Design: Designed to minimize water hammer effects, these valves close slowly to prevent significant pressure changes.
  • Application: Ideal for systems sensitive to pressure surges, such as HVAC and water supply systems.

6. API 594 Double Door Check Valve

  • Design: Manufactured according to API 594 standards, ensuring high-quality performance and reliability.
  • Application: Used in oil and gas applications, as well as in chemical processing.

7. Bi-Directional Double Door Check Valve

  • Design: Allows flow in both directions, making it versatile for various piping configurations.
  • Application: Often used in systems where flow direction may change, such as in cooling systems.

Conclusion

Choosing the right type of flange double door check valve depends on the specific requirements of the application, including flow rates, pressure conditions, and space constraints. Each type offers distinct advantages suited to different operational needs.