Pressure Relief Valves

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Pressure Relief Valves


Pressure Relief Valves

Parker’s pressure relief valves are designed to limit the upstream pressure by opening at a preset value and discharging the medium. Our range includes pressure relief valves in different mounting styles and for a variety of application areas: industrial as well as mobile, for the use in hydraulic and pneumatic systems, for fluid and gas handling, process control and refrigeration. Our valves can function under high operating pressures and wide-ranging temperatures which make them suitable for use within various applications across the major industrial markets, including those that operate in extreme environments.


Parker’s pilot operated relief valves are designed for continuous duty applications featuring great stability with low pressure drop; working with pressures up to 420 bar (6000 psi) and flows up to 400 lpm (106 gpm).

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The SR, SRH, H Safety Relief Valves are designed to protect industrial and commercial refrigeration systems from overpressure situations. This series is designed to open at a specified pressure and can be used in single or dual relief configurations.

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The H Series of Safety Relief Valves are designed to protect refrigeration systems from overpressure situations and feature a high flow capacity. The H Series are flanged for easy replacement and can be used in a single or dual relief combination.

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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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Parker's Refrigerating Specialties Division offers the M1 Inline Manifold and the M2, M3 and M4 Dual Stop Manifolds for use in conjunction with their full line of Safety Relief Valves.

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Pressure relief valves series RDM are direct operated piston type valves with low hysteresis. They can be used as P-T relief or as T-T controlled counter balance valve. They are available in NG06 and NG10.

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The CSR and CSRH Valves employ proven principles of design, these safety relief valves are highly reliable and dependable. The valves are precision machined assure valve opening at the set pressure long after installation.

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The pilot operated pressure relief valves series SCRM are in sandwich design for easy configuration of stack systems. They are available in size NG06.

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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 Autoclave's RVP Series relief valves provide reliable venting of gases for set pressures from 3,000 psi (206 bar) to 75,000 psi (5171 bar). The valve’s metal seat design provides shut-off of liquids and gases to commercial standards.

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Parker pilot operated pressure relief valves for subplate mounting series R4V/R6V provide an outstanding constant pressure behaviour. Series R4V/R6V Proportional enables a continuous pressure adjustment by the additional proportional unit.

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Parker's R Series Relief Valves are designed such that when the upstream pressure exceeds the closing force exerted by the spring, the lower stem opens, permitting flow through the valve. Pressures range from 10 PSI (0.7 BAR) to 6,000 PSI (413.7 BAR).

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Parker Autoclave's RVS Series relief valves provide reliable venting of gases for set pressures from 1,500 psi (103 bar) to 20,000 psi (1378 bar). The valve’s soft seat design provides bubble tight sealing, repeatable pop-off, and reseat capability.

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Parker digital amplifier modules series PCD00A-400 combine all necessary functions for the optimal operation of two proportional pressure/flow control valves.

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The RV Series is a PTFE relief valve that’s ideally suited for ultra-high purity semiconductor, DI water, and aggressive chemical applications. The valve is highly compact and can be adjusted in the field to provide safe and reliable pressure relief.

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Parker Bestobell’s cryogenic safety relief valves are designed to reduce the risk of damage from over-pressure to static and road-going cryogenic storage tanks. They work by an innovative proportional lift action to ensure gentle release of pressure.

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Parker’s direct acting differential area relief valves are for fast response intermittent applications and work up to 380 bar (5500 psi) and 151 lpm (40 gpm). These valves have lower leakage rates and pressure rise than standard direct acting reliefs.

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The Parker VR7 Series Pressure Relief Valve is designed to ensure safety and protection of downstream process equipment by venting excess pressure from a regulator should a minor seat leak occur. It is available in stainless steel.

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Parker's direct operated proportional pressure relief valve series RE06M*W provides a fast response time and low presssure drop due to its powerful solenoid.

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Parker pilot operated pressure relief valves series R5V and R5V*P2 provide an outstanding constant pressure behaviour. The SAE flanges allow to mount the valves directly on the flanges of pumps or actuators to achieve a very compact design.

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The SRLQ liquid relief valves are conventional, direct spring loaded safety relief valves designed to protect the liquid containing portions of vessels built to the ASME Boiler and Pressure Vessel Code.

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LV Series lockout tag out valves are OSHA 29 CFR part 1910 compliant. Stainless Steel versions meet NACE MRO175 / ISO 15156. The pop-up pressure Indicator meets requirements for ANSI B11 and PMMI B 155 standards. Port sizes: 1/4" to 2".

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Parker's pilot operated pressure relief valves series ZDV in sandwich design offer maximum flow rates up to 140l/min and enable an easy configuration of stack systems.

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Parker electronic modules series PWDXXA-40* combine all necessary functions for the optimal operation of proportional directional control valves with position sensor or valves in closed loop systems.

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687PDC
687PDC