8A-RH4A-VT-SS-K1 Parker Relief Valve

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  • Application: Monitoring Line, Process Control Line, Research Equipment
  • Body Material: ASTM A182 F316 Stainless Steel
  • End Connection: A-LOK Double Ferrule Compr. x A-LOK Double Ferrule Compr.
  • Inlet Size: 1/2 in.
  • Outlet Size: 1/2 in.
  • Pressure Rating: 6000 PSIG CWP, 50 to 350 PSIG (Cracking)
  • Seal Material: Fluorocarbon Rubber
  • Spring Material: 17-7 Stainless Steel
  • Temperature Rating: -10°F to 400 °F

Parker RH4A Series Relief Valve, 1/2" x 1/2", A-LOK Double Ferrule Compression x A-LOK Double Ferrule Compression, 6000 PSIG CWP/50 to 350 PSIG Cracking, 316 Stainless Steel, Fluorocarbon Rubber Seal, Adjustable Pressure, Angle, Relief Valve.

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Product Description

Check Valve; Nominal Size 1/2 Inch x 1/2 Inch; Orifice Diameter 0.453 Inch; End Connection Male Threaded x Male Threaded; End to End Distance 3.56 Inch; Body Material ASTM A276 316 Stainless Steel; Cap Material ASTM A276 316 Stainless Steel; Spring Material 316 Stainless Steel; Seat Material Highly Fluorinated Fluorocarbon Rubber; Temperature Rating -15 to 200 Deg F; Pressure Rating 6000 PSIG CWP, 10 PSI (Cracking); Inclusions/Features ASTM A479 Type 316 Stainless Steel Poppet; Application Uni-Directional Flow Control of Fluid and Gas, Chemical Processing, Oil and Gas Production and Transmission, Pharmaceutical, Pulp and Paper, Power and Utility, Back Flow Preventer; Hex Size 1.25 Inch; Flow Capacity 3.53 Cv


Resilient, Custom Molded, Blow-Out Resistant Seat Design; Back Stopped Poppet Minimize Spring Stress; 100% Factory Tested for Both Crack and Reseat; Heat Code Traceability

Series/Model Information

Parker C Series Check Valves are designed for uni-directional flow control of fluids and gases in industries such as chemical processing, oil and gas production and transmission, pharmaceutical, pulp and paper, power and utilities.


304 Stainless Steel Packing Gland/Stem Hex/Grounding Spring, 301 Stainless Steel Seat/Stem Spring, PEEK Thrust Washer