Parker 4Z-RL4A-EPRT-SS-MN-KC - Relief Valves, 6,000 PSI - R Series

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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Brand Parker
Part No. 4Z-RL4A-EPRT-SS-MN-KC
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Products specifications
Attribute nameAttribute value
Maximum Operating Pressure100Connection Size1/4
Connection 2 Size1/4Maximum Operating Temperature135
Materials of ConstructionStainless Steel 316Minimum Operating Temperature-57
DivisionInstrumentation Products DivisionConnection 1 SizeSingle Ferrule Compression
Packing MaterialEthylene Propylene RubberBack-Up Washer MaterialPTFE
Actuation TypeManual OverdriveFlow Coefficient0.75
Cracking Pressure50 to 100Connection Size1/4"
Material316 Stainless SteelConnection 1 StyleSingle Ferrule Compression Fitting
Connection 2 StyleSingle Ferrule Compression FittingConnection Size 21/4"
Packing MaterialEthylene Propylene RubberCracking Pressure (psi)50 - 100
ActuationManual Overdrive
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