Check valves are extremely simple devices yet they serve an important purpose in many pneumatic circuits.  Generally used in systems where back flow is not permitted, check valves are two-port valves that allow free flow in one direction and block flow in the opposite direction.  They can also be used as a bypass valve, allowing media around components such as needle valves which restrict flow in both directions.

Pneumatic check valves rely on air flow to function and are designed with a specified cracking pressure, which is the minimum pressure required for the valve to operate. Because they are self-automated, pneumatic check valves do not require assistance to open or close and will continue to function without a manual operator, electricity or other external controls. Pneumatic check valves are commonly used in vacuum breakers, steam lines, cooling towers, HVAC system, sump pumps, pressure pumps, boilers and more.

Common uses for check valves include:
Industrial processes including fluid system in chemical and power plants
Aerospace applications including aircraft hydraulic systems
Applications where multiple gases are mixed into a single stream
Irrigation sprinklers and drip irrigation systems
Home heating systems
Rainwater harvesting systems connected to a main water supply
Pneumatic Check Valves for Flow and Bypass Applications

To meet the needs of your application, Pneumadyne manufactures a variety of Check Valves with threaded, barbed and push-to-connect ports.  Our durable valves feature cracking pressures of 0.1 and 0.5 psi to quickly allow flow through the output port.

Features:
Variety of porting options
Low cracking pressure
Electroless nickel plated for corrosion resistance
Durable brass construction
Compact inline or port mounting styles

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