Safety Valves

Field Air Compressors offers a standard range of safety valves suitable for a variety of compressed air applications. There are options of preset and adjustable units available, with sizes ranging from 1/4″ to 1″ kept in stock.

The relief capacity for safety valves depends on the relief discharge area the compressibility factor of the actual gas the temperature of the gas the geometry of the safety valve. A safety relief valve must be capable of relieving the capacity of the connected compressor(s) at operating pressure. Note that the relief pressure can not be set higher than the maximum rated working pressure of any equipment in the system. If the operating pressure is right below the relief pressure of the valve the valve may start leaking.

A “rule of thumb” is to set the relief pressure 10% above the working pressure of the system.┬áThe relief valve is designed or set to open at a predetermined set pressure to protect pressure vessels and other equipment from being subjected to pressures that exceed their design limits.

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