Model No: 330

End of line, weight loaded, combination, atmospheric deflagration proof

The assembly of this pressure relief valve with an effective flame arrestor will enhance the safety of personnel, site location, and equipment, by reducing or eliminating the risk of flashover through the vent.

Storagetech’s Model 330 Pressure Vacuum Relief Valve with Flame Arrestor provides protection to bulk storage tanks and vessels from over and under-pressurization. The valves are mounted on the tank roof flange or a vent pipe from the vapour space. In the closed position the pressure relief pallet and diaphragm assembly are held tightly against a seal to prevent the loss of vapour to the atmosphere. As the internal pressure in the tank increases, due to product filling and vapour development, the pressure in the tank increases, and in the event that the set pressure of the unit is reached, the diaphragm will open and discharge the gas into the atmosphere. The opening set-point is selectable from a range between +61 mbar and +1000 mbar (+24 inch W.C. and 400 inch W.C.), and the valve will reseal when the tank returns to a safe pressure. An in-line flame arrestor combination provides extra safety and avoids flame entrance inside the storage tank or pipe through valve openings. The flame arrestor can be unbolted and removed easily for maintenance purposes without affecting the pressure vacuum relief valve function.