One way flow restrictor air valve Female-Female

The VEPA non-return (check) valve for air F-F lets compressed air pass in only one direction and automatically prevents backflow, protecting the compressor, tools and components of the pneumatic system. The valve opens with airflow in the permitted direction and closes as soon as the pressure drops or the direction reverses. Both ports have a female thread (F-F) for easy in-line installation between two lines. It is made of quality brass/metal resistant to corrosion and working pressures, with a reliable internal mechanism. Available in thread sizes 1/8 inch, 1/4 inch, 3/8 inch and 1/2 inch.