Parker 4KF-RL4A-EPRT-SS-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. 4KF-RL4A-EPRT-SS-KC
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Products specifications
Attribute nameAttribute value
Maximum Operating Pressure100 psiConnection Size1/4 inch
Minimum Operating Temperature-70 °FMaximum Operating Temperature275 °F
Materials of ConstructionStainless Steel 316DivisionInstrumentation Products Division
Actuation TypeStandardFlow Coefficient0.75 Cv
Packing MaterialEthylene Propylene RubberCracking Pressure50 to 100 psi
Back-Up Washer MaterialPTFEConnection 1 SizeBSP F
Connection 2 SizeBSP FConnection Size1/4"
Material316 Stainless SteelConnection Size 21/4"
ActuationStandardPacking MaterialEthylene Propylene Rubber
Cracking Pressure (psi)50 - 100Connection 1 StyleBSP F
Connection 2 StyleBSP F
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