Breather Valve

Breather valves are low pressure device designed to protect tanks, recess systems and equipment from damage due to over pressure or vacuum. They are also know as pressure/vacuum relief valves. Breather valves retain toxic vapours thus preventing atmospheric contamination and increased fire protection and safety. Retention of vapour also minimizes production losses through evaporation.

Pressure/Vacuum relief valves are used extensively on bulk storage tanks, including fixed roof tanks with  floating cover, to minimize evaporation loss. The valves prevent the build up of excessive pressure or vacuum that can damage the storage vessel. Pressure and vacuum protection levels are controlled with weighted pallets or spring and can be combined to provide the required pressure/vacuum setting.