Parker 4A-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. 4A-RH4A-KZT-SS-K4
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Products specifications
Attribute nameAttribute value
Maximum Operating Temperature93 °CConnection Size1/4 inch
Maximum Operating Pressure2250 psiMinimum Operating Temperature-20 °F
Materials of ConstructionStainless Steel 316DivisionInstrumentation Products Division
Connection 1 SizeTwo Ferrule CompressionConnection 2 SizeTwo 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 StyleTwo Ferrule Compression Fitting
Connection 2 StyleTwo Ferrule Compression FittingConnection Size 21/4"
ActuationStandardPacking MaterialHighly Fluorinated Fluorocarbon Rubber
Cracking Pressure (psi)1500 - 2250
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