Pressure restriction valve with piston movable by pressure and resetting spring - includes safety valve mechanism with matching active surfaces

摘要

The safety valve (22) is pref. formed at the base (23) of the beaker-like piston (15) whose lower part is divided into the base and guide collar (16). The guide collar supports a retaining ring (47), whilst the base supports a flange (24) which forms the closing body for the safety valve (22). The retaining ring (47) secures an O-ring (48) which forms the valve seat (25) for the safety valve. USE/ADVANTAGE - The opening pressure for the safety valve can be set just above the restricting pressure of the pressure restricting valve.