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A pressure relief valve characterized by rapid opening or closing or by gradual opening or closing, generally proportional to the increase or decrease in pressure.
This pressure relief valve is designed to protect equipment from overpressure. The valve should be handled with care, not subjected to heavy shock loads and protected to prevent contamination from getting inside. It should be installed correctly per ASME boiler and pressure vessel code requirements, where applicable.
pressure relief valve utilizing spring force as primary control, directly affected by fluctuations in backpressure, commercially available with fixed or adjustable blow-down. Backpressure affects set pressure on a 1:1 ratio. Self-draining when mounted vertically. Advantageous in handling “dirty” services. Cost-effective 1/2 NPT—2 NPT.
It contains technical information on pressure relief valves and devices. The handbook has 8 chapters that cover terminology, codes and standards, design fundamentals, valve sizing and selection, and engineering support information.
pressure relief valves. They are used for limitation (DB) or limitation and solenoid-actuated unloading (DBW) of the operating pressure. The pressure relief valves (DB) basically consist of the main valve (1) with main spool insert (3) and pilot control valve (2) with pressure adjustment element.
Pressure relieving valves must be handled carefully and never subjected to sharp impact loads. They should not be struck, bumped or dropped. Rough handling may alter the pressure setting, deform valve parts and affect seat tightness and valve performance adversely. WARNING Suitability of the material and product for the use
The pressure relief valve (1) in PVP should be set at a pressure of approximately 30 bar [435 psi] above maximum system pressure (set on the pump or external pressure relief valve). Service Manual
