Pneumatic Check Valves

One-Way Flow Protection for Pressure and Vacuum Pneumatic Systems

Pneumatic check valves allow flow in one direction while blocking reverse flow. The source range can be used in both positive-pressure and vacuum circuits, making the valves useful for protecting pressure, vacuum and holding functions.

For vacuum operation, the source description lists a cracking point of 10 inHg / 700 mbar(a) / 532 Torr. Port labeling differs depending on whether the valve is used for pressure or vacuum service.

Connection Guidance

• Pressure service: P = pressure supply, A = application
• Vacuum service: P = application, A = vacuum source
• Vacuum cracking point: 10 inHg / 700 mbar(a) / 532 Torr

Why Use a Check Valve?

• Prevents unwanted reverse flow
• Can help retain pressure or vacuum in suitable circuits
• Useful for pneumatic logic, holding and vacuum applications

Common Applications

• Pneumatic pressure circuits
• Vacuum handling systems
• Cylinder and actuator circuits
• Vacuum generators
• Machine safety and holding functions
• OEM equipment