Parker Relief Valve

$225.84 / EA
  • Manufacturer: Parker Instrumentation
  • Product Family: RH4A Series
  • Applicable Standard: ANSI/ASME B1.20.1, NSI
  • Application: Monitoring Line, Process Control Line, Research Equipment
  • Body Material: ASTM A182 F316 Stainless Steel
  • End Connection: Male Threaded x Female Threaded
  • Inlet Size: 1/4 in.
  • Outlet Size: 1/4 in.
  • Pressure Rating: 6000 PSIG CWP, 2250 to 3000 PSIG (Cracking)
  • Seal Material: Ethylene Propylene Rubber
  • Spring Material: 17-7 Stainless Steel
  • Temperature Rating: -70°F to 275 °F
Parker RH4A Series Relief Valve, 1/4" x 1/4", MPT x FPT, 6000 PSIG CWP/2250 to 3000 PSIG Cracking, 316 Stainless Steel, Ethylene Propylene Rubber Seal, Adjustable Pressure, Angle, Relief Valve.

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Product Description

Ball Valve; Type 3-Way, Panel Mount; Actuation Type Diverter 180 Degree Lever Handle; Nominal Size 1/2 Inch x 1/2 Inch x 1/2 Inch; End Connection A-LOK Double Ferrule Compression x A-LOK Double Ferrule Compression x A-LOK Double Ferrule Compression; End to End Distance 4.68 Inch; Ball Material 316 Stainless Steel; Body Material ASTM A351 Grade CF3M 316 Stainless Steel; Stem Material ASTM A276 316 Stainless Steel; Seat Material PTFE; Seal Material Live-Loaded PTFE; Handle Material Black Nylon 6/6; Temperature Rating -65 to 350 Deg F; Pressure Rating 1500 PSIG; Inclusions/Features PTFE Connector O-Ring/Retainer Seal/Stem Seal, 316 Stainless Steel Stem Washer/Panel Mounting Nut/Seat Retainer/End Connector/Packing Nut, Stainless Steel Handle Set Screw; Application Flow Diversion/Selection, Quick Fill System, Process Mixing System, Instrument Panel, Remote Shut-Off; Orifice Diameter 0.406 Inch; Flow Capacity 3.62 Cv


Micro-Finished Ball Provides a Positive Seal; Adjustable PTFE Stem Seal Can be Maintained In-Line; Handle Indicates Direction of Flow; Low Operating Torque; Positive Handle Stop

Series/Model Information

Parker's B Series Ball Valves are available manually, pneumatically, and electrically actuated. They provide quick on-off control of fluids utilized in process and instrumentation applications. A broad selection of valve body, seat, and seal materials provide a wide range of pressures (up to 6,000 PSI) and temperatures (up to 450F/232C) at which the valve may be used.


PTFE Back-Up Ring/Washer, 316 Stainless Steel Cap/Upper Stem/Bonnet/Lower Stem/Seat Retainer/Stem Guide/Handle Stem/Locknut, Highly Fluorinated Fluorocarbon Rubber Stem Seal/Seat, Zinc Plated Steel Plug, Phenolic Handle