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The operation of a PRV is based on a simple yet effective mechanical principle. When the inlet pressure exceeds the setpoint of the valve, the internal mechanism adjusts to reduce the pressure to the desired level. Typically, this involves the use of a spring-loaded diaphragm or piston that moves in response to changes in pressure. As the upstream pressure increases, the diaphragm is pushed against the spring force, causing the valve to partially close until the outlet pressure stabilizes at the preset value.


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In the oil and gas industry, pressure relief valves are commonly used in oil refineries, pipelines, and storage tanks to protect equipment from overpressure caused by sudden changes in flow rates or equipment malfunctions. These valves are designed to open automatically when the pressure exceeds a certain threshold, allowing excess fluid or gas to be released safely and effectively.. These valves are designed to handle a wide range of chemical substances and operating conditions, making them critical components in ensuring the safety and reliability of chemical processing operations
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