Parker 4Z-RH4A-BNT-SS-K6 - 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-BNT-SS-K6
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Products specifications
Attribute nameAttribute value
Maximum Operating Temperature107 °CMinimum Operating Temperature-30 °F
Connection 2 Size1/4 inchConnection Size1/4 inch
Maximum Operating Pressure4000 psiMaterials of ConstructionStainless Steel 316
DivisionInstrumentation Products DivisionConnection 1 SizeSingle Ferrule Compression
Actuation TypeStandardFlow Coefficient0.41 Cv
Packing MaterialNitrile RubberCracking Pressure3000 to 4000 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 MaterialNitrile Rubber
Cracking Pressure (psi)3000 - 4000
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