Durable relief valve designed for storage vessels requiring pressure and vacuum venting. An 8″ dead weight cover opens completely, to allow for high venting capacity. Standard settings are 2 oz pressure and 0.4 oz vacuum, with other settings available. The #54 can be ordered with bolting or welding base. Flange hole pattern complies with API bolt circle dimensions. Standard gasket is neoprene, other gasket materials available.
Bolt Pattern: (16) – 1/2″ dia holes on a 10 3/8″ B.C.