Breather Valve

Product Description

All Fluidyne Breather Valves are available with flanged outlets or vented to atmosphere. Pressure/Vacuum Relief Valves are used mainly on bulk storage tanks, including fixed roof tanks with floating covers, to minimize evaporation loss. The Valves prevent the build-up of excessive pressure or vacuum which can unbalance the system or damage the storage vessel. Pressure and Vacuum protection are controlled with weight loaded pallets or springs loaded disc and the required Pressure/Vacuum settings are reached. Sometimes pressure settings require spring loaded disc and the vacuum settings use weight loaded pallet in one device.

Fluidyne Breather Valves follow American Petroleum Institute Standard API 2000 or other applicable standard where tanks are generally large volume welded vessels that are built to API 650 standard. In order to accommodate large volumes at low set pressures, these Valves have ports that are larger in area than the inlet or nozzle connection. The low setting required generally require weight loaded disc or pallet and sometimes require spring loaded disc. Because of the above, a Breather Valve requires approximately 20% (minimum) to 100% over set pressure in order to reach full opening of the Valve.

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