WEH CGA- 870 gas connector is simple to use with a no twist, no turn approach to filling. Simply connect our product onto your valve and lock into place with a forward movement of the actuator lever. You are ready to fill the cylinder in a matter of seconds! The WEH 870 is a yoke style connector used for medical oxygen applications. It has a brass body and stainless seal actuator piston to maximize product performance and service life. The WEH 870 has a pressure rating of 3600 PSI, weighs 42 ounces and is cleaned for O2 service. Each connector is supplied with a Delrin actuator lever, a straight-flow 180Â° termination port and FDA grade Viton elastomer seals. The elastomer compound used is based upon industry approval and performance characteristics for the application. FasTest offers other elastomer compounds upon request.