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 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).
The SR and SRH 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.
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.
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).
Direct Operated Pressure Relief Valve - Series RDM(AP)
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.
Pilot Operated Pressure Relief Valve - Series SCRM(AP)
The pilot operated pressure relief valves series SCRM are in sandwich design for easy configuration of stack systems. They are available in size NG06.