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Picture of Parker 4F-RL4A-VT-SS-KG - Relief Valves, 6,000 PSI - R Series

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Parker 4F-RL4A-VT-SS-KG - 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-RL4A-VT-SS-KG
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Products specifications
Attribute nameAttribute value
Maximum Operating Temperature400 °FMaximum Operating Pressure400 psi
Connection Size1/4 inchMaterials of ConstructionStainless Steel 316
DivisionInstrumentation Products DivisionConnection 1 SizeNPT F
Connection 2 SizeNPT FMinimum Operating Temperature-23 °C
Actuation TypeStandardFlow Coefficient0.75 Cv
Packing MaterialFluorocarbon RubberBack-Up Washer MaterialPTFE
Cracking Pressure225 to 400 psiConnection Size1/4"
Material316 Stainless SteelConnection 1 StyleNPT F
Connection 2 StyleNPT FConnection Size 21/4"
ActuationStandardPacking MaterialFluorocarbon Rubber
Cracking Pressure (psi)225 - 400
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