How to Leak Test Medical One-Way Check Valves



Market Requirements: 

Check or one-way valves allow liquid flow in one direction and resist reflux, or back-flow, in the opposite direction based upon the presence of an internal elastomeric “duckbill” valve or an elastomeric disc. This elastomeric valve is often housed in an injection-molded polymer/plastic body which is either ultrasonically welded or adhesively bonded.

Check valves are manufactured in high volume on highspeed automated production lines and testing 100% of parts for the different potential failures is critical.

CTS Solution: 

The common method to leak test these valves is the use of dry compressed air pressure or vacuum decay at pressures ranging from -12 to 50 psig. The single channel Sentinel Blackbelt or multi-channel Blackbelt Pro pressure/vacuum decay instrumentation with multiple sequential ports per test channel enable this type of testing.

Read the application note below to learn about each step of the testing process. 

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