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Picture of Parker 4Z-RH4A-KZT-SS-K4 - Relief Valves, 6,000 PSI - R Series

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Parker 4Z-RH4A-KZT-SS-K4 - 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-KZT-SS-K4
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Products specifications
Attribute nameAttribute value
Maximum Operating Temperature200 °FConnection 2 Size1/4 inch
Connection Size1/4 inchMaximum Operating Pressure2250 psi
Minimum Operating Temperature-20 °FMaterials of ConstructionStainless Steel 316
DivisionInstrumentation Products DivisionConnection 1 SizeSingle Ferrule Compression
Actuation TypeStandardFlow Coefficient0.41 Cv
Packing MaterialHighly Fluorinated Fluorocarbon RubberCracking Pressure1500 to 2250 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 MaterialHighly Fluorinated Fluorocarbon Rubber
Cracking Pressure (psi)1500 - 2250
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