Parker 4Z-RH4A-VT-SS-K3 - 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-RH4A-VT-SS-K3
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Products specifications
Attribute nameAttribute value
Maximum Operating Temperature400 °FMaximum Operating Pressure1500 psi
Connection Size1/4 inchMaterials of ConstructionStainless Steel 316
DivisionInstrumentation Products DivisionConnection 1 SizeSingle Ferrule Compression
Minimum Operating Temperature-10 °FConnection 2 SizeSingle Ferrule Compression
Actuation TypeStandardFlow Coefficient0.41 Cv
Packing MaterialFluorocarbon RubberCracking Pressure750 to 1500 psi
Back-Up Washer MaterialPTFEConnection Size1/4"
Material316 Stainless SteelConnection 1 StyleSingle Ferrule Compression Fitting
Connection 2 StyleSingle Ferrule Compression FittingConnection Size 21/4"
ActuationStandardPacking MaterialFluorocarbon Rubber
Cracking Pressure (psi)750 - 1500
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