Products > Valves: Manual

Relief

Manual Relief Valve: A valve used to limit the pressure in a vessel to a certain maximum level. Pressure is relieved by allowing pressurized media to escape out of the system. The valve is designed or is set to open at a predetermined pressure. When the pressure setting is exceeded, the relief valve becomes the "path of least resistance". The valve is forced open, and a portion of the media is diverted through the auxiliary route. As the media is released, the pressure inside the vessel drops. Once it reaches the valve's re-seating pressure, the valve closes.

Things to Consider When Purchasing This Product:

Nominal disc size, Burst pressure and coincident burst temperature, Burst tolerance, System design pressure, Design temperature, Allowable accumulation (%), Fluid/State, Operating temperature minimum and maximum, Operating pressure minimum and maximum, Relief temperature, Molecular weight (gas or vapor), Ratio of specific heates, Specific gravity at relieving conditions (liquid), Viscosity at relieving conditions, Compressibility factor, Superimposed back pressure minimum and maximum, Frequency of pressure cycling, Min and max cyclic pressure, Required capacity, Relief valve (Yes/No), Combined capacity factor, Maximum combined capacity, Reaction force, Discharge line orientation critical, Orientation pipe sketch, ASME certification required, Replacement frequency, Materials of construction: Pressure disc, Support ring (inlet side), Support ring (outlet side), Soft gasket, Vacuum support, Sealing disc, Sealing disc cover, Liner (inlet side), Liner (outlet side), Coating (inlet side), Coating (outlet side), Teeth ring, Warranty