PRESSURE RELIEF VALVE WITH PNEUMATIC PILOT

摘要

A pressure relief valve for rapidly exhausting air pressure from a source of such pressure. The valve includes a housing containing a valve member located across a main port provided in the housing that directly receives the air pressure from the pressure source. A second port is provided for receiving a pilot pressure from the pressure source, and a piston is located adjacent the second port. At least one exhaust port is provided in the housing for exhausting to atmosphere the air received through the main port and against the valve member.