Pneumatic Check Valves
Pneumatic Check Valves are designed for industrial vacuum and pneumatic automation applications. These check valves are able to be used on both pressure and vacuum systems. The crack pressure when being used in a vacuum operation is 10”Hg / 700mbar(a) or 532Torr.
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One-Way FlowAllows flow in the intended direction
Backflow PreventionHelps isolate pneumatic circuits
Compact InstallationSuitable for machine and panel plumbing
Automation UseFor compressed air and compatible pneumatic circuits
What Are Pneumatic Check Valves?
A pneumatic check valve allows flow in one direction while restricting reverse flow. In automation systems, check valves are used to prevent backflow, isolate sections of a circuit and help preserve pressure or vacuum conditions where the valve specification is appropriate.
Key Features
- Automatic one-way flow control
- Helps prevent reverse flow in pneumatic circuits
- Compact installation
- Useful for machine building and automation
- Available in connection styles suited to pneumatic plumbing
Typical Applications
- Compressed air circuits
- Machine automation
- Actuator circuits
- Pneumatic manifolds
- Vacuum isolation where model ratings permit
- OEM equipment
Selection Guidance
Confirm flow direction, port or tube size, cracking pressure, working pressure and media compatibility. Install the valve with the flow arrow aligned to the intended direction.
Application Tip: Final selection should be based on the actual product, machine cycle, operating environment and required pneumatic or vacuum performance. Confirm model-specific ratings before installation.
Check Valve vs. Shutoff Valve
A check valve operates automatically according to flow direction. A shutoff valve is manually or mechanically actuated to open or close a circuit.
Why Use This Product Family?
A pneumatic check valve allows flow in one direction while restricting reverse flow. In automation systems, check valves are used to prevent backflow, isolate sections of a circuit and help preserve pressure or vacuum conditions where the valve specification is appropriate. Selecting the correct configuration can simplify machine integration, improve serviceability and provide more consistent application performance.
Frequently Asked Questions
What does a pneumatic check valve do?
It permits flow in one direction and restricts reverse flow.
Does a check valve need a control signal?
No. It operates automatically from the pressure differential across the valve.
What is cracking pressure?
It is the minimum differential pressure required to begin opening the valve.
Can a check valve be used for vacuum?
Only when the selected model is rated and oriented appropriately for the vacuum application.
How should it be installed?
Install according to the indicated flow direction and within the valve pressure and media ratings.
Why use a check valve in automation?
It can prevent backflow, isolate circuit sections and help maintain desired pressure conditions.
