Pressure Relief Valves

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Pressure Relief Valves

Pressure Relief Valves

Parker pressure relief valves are designed such that when upstream pressure exceeds the closing force exerted by the spring, the lower stem opens, permitting flow through the valve.

Parker's pressure/vacuum relief valves are designed for use with pressurized reservoirs to prevent pump cavitation by maintaining positive tank pressure and filtering incoming air.
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Parker’s direct acting relief valves are available in several cavity sizes and are designed for continuous duty applications with pressures up to 420 bar (6000 psi) and flows up to 200 lpm (53 gpm).
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687PDC
687PDC