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UK Office

Elmac Technologies

Coast Road
Greenfield
Flintshire

UK
CH8 9DP
 
Phone: +44 1352 717600
Fax: +44 1352 717642
Products
Pressure & Vacuum Relief Valves

Home » Products » Tank Equipment » Pressure Relief Valves

pressure vacuum relief valve
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Pressure/Vacuum Relief Valves
(Breather Valves)

Weight or Spring-Loaded Pressure/Vacuum Relief Valves

Application

Direct acting pressure/vacuum relief valves (also known as breather valves, conservation vents, or safety vents) are special types of relief valves which are specifically designed for tank protection. The range includes pressure only, vacuum only and combined pressure/vacuum valves, all available with flanged outlets or vented to atmosphere.

Pressure / vacuum relief valves are used extensively on bulk storage tanks, including fixed roof tanks with floating covers, to minimise 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 levels are controlled with weighted pallets or springs and can be combined to provide the required pressure/vacuum settings. It is common to combine pallet and spring systems in one unit i.e. pressure settings require a spring section, whilst the vacuum settings use the pallet method.

Variants

Click an image below for more information on the variant types available.

Schematic diagram of a pressure & vacuum relief to atmosphere valve

Pressure & Vacuum Relief to Atmosphere
 

Schematic diagram of a spring loaded pressure & vacuum relief to atmosphere valve

Pressure & Vacuum Relief to Atmosphere
(Spring Loaded)

Schematic diagram of a pressure relief to atmosphere valve

Pressure Relief to Atmosphere

Schematic diagram of a vacuum relief from atmosphere valve

Vacuum Relief from Atmosphere

Schematic diagram of a pressure relief to closed line valve

Pressure Relief to Closed Line
 

Schematic diagram of a pressure relief to atmosphere & vacuum relief from closed line

Pressure Relief to Atmosphere
Vacuum Relief from Closed Line

Schematic diagram of pressure relief piped away & vacuum relief from pipe valve

Pressure Relief to Closed Line
Vacuum Relief from Closed Line

Schematic diagram of a vacuum relief from closed line valve

Vacuum Relief from Closed Line
 


Quick Links:

Pressure/Vacuum Relief Valve Data Sheet (in data centre)
Tank & Vessel Protection Equipment
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