Vacuum Relief Valve - Top mounted - pipe-away - weight loaded - Model 191

Storagetech™ 's Model 191 Top Mounted, Pipe Away,
Weight Loaded Vacuum Relief Valve provides protection
to bulk storage tanks and vessels from excessive under
pressurisation. The valves are mounted on the tank roof
flange or a vent pipe from the vapour space. System is
especially prefered for transfering vapour content to collection
system or condensation units, even prevent certain
fire hazards.The vacuum relief pallet and diaphragm
assembly is held tightly against a seal to prevent the loss
of vapour to atmosphere in the closed position. As the internal
pressure in the tank decreases, due to emptying
vacuum conditions occurs, the balance between the tank
pressure and the external atmospheric pressure changes.
Accordingly when the set pressure of the unit is reached,
the diaphragm opens to vacuum gas content and rebalance
the internal pressure. Storagetech Valves Activated
as close as to set pressures, less than 10% of set )ressures,
ensuring accurate pressure management and isolate
emission losses perfectly.