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Pressure relief valves protect vessels and piping systems from over pressure. Relief valves begin to open as the pressure increases past the set pressure, but require about 10% over pressure to completely open. As the pressure drops, the valves begin to close, shutting fully after dropping sufficiently below the set pressure. Safety relief valves and pop-off valves open completely when the set pressure is reached.

Care should be taken in selecting a relief valve that will pass enough flow to relieve the system from over pressure. Refer to ASME and API codes when selecting safety relief valves, particularly in steam, air, hot water, and chemical applications.

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Kunkle Pressure Relief Valves

Kunkle Valve
Kunkle Valves is a leading manufacturer of quality safety and relief valve products for industrial and commercial applications, including steam, air, liquid (including cryogenics) and non-hazardous gases. Available with a range of ASME Code, NB certified, and non-code products. Kunkle safety and relief valve products range in size from 1/4-inch NPT through 6-inch flange.

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