Parker 4F-RH4A-KZT-SS-K2 - 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. 4F-RH4A-KZT-SS-K2
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Products specifications
Attribute nameAttribute value
Maximum Operating Temperature200 °FMaximum Operating Pressure750 psi
Connection Size1/4 inchMinimum Operating Temperature-20 °F
Materials of ConstructionStainless Steel 316DivisionInstrumentation Products Division
Connection 1 SizeNPT FConnection 2 SizeNPT F
Actuation TypeStandardFlow Coefficient0.41 Cv
Packing MaterialHighly Fluorinated Fluorocarbon RubberCracking Pressure350 to 750 psi
Back-Up Washer MaterialPTFEConnection Size1/4"
Material316 Stainless SteelConnection 1 StyleNPT F
Connection 2 StyleNPT FConnection Size 21/4"
ActuationStandardPacking MaterialHighly Fluorinated Fluorocarbon Rubber
Cracking Pressure (psi)350 - 750
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