Parker Hannifin RH4 Series Hydraulically Pilot Operated Check Valves

The hydraulically pilot operated check valves series RH for in-line mounting are proven components of Parker's check valve product range which ensure a leak-free blocking of the flow and thus a reliable operation. They allow free flow in one direction (B to A), the counter flow is blocked (A to B). By applying pilot pressure the ball can be lifted from its seat and allows flow from A to B.

RH4 Series

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  • Parker RL4A Series Relief Valve
    4M4F-RH4A-EPRT-SS-K5 Parker Relief Valve
    4M4F-RH4A-EPRT-SS-K5

    Parker Hannifin

    Product Type: Relief Valves

    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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  • Parker RL4A Series Relief Valve
    4M4F-RH4A-EPRT-SS-K4 Parker Relief Valve
    4M4F-RH4A-EPRT-SS-K4

    Parker Hannifin

    Product Type: Relief Valves

    Parker RH4A Series Relief Valve, 1/4" x 1/4", MPT x FPT, 6000 PSIG CWP/1500 to 2250 PSIG Cracking, 316 Stainless Steel, Ethylene Propylene Rubber Seal, Adjustable Pressure, Angle, Relief Valve.
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  • Parker RL4A Series Relief Valve
    4Z-RH4A-VT-SS-MN-K1 Parker Relief Valve
    4Z-RH4A-VT-SS-MN-K1

    Parker Hannifin

    Product Type: Relief Valves

    Parker RH4A Series Relief Valve, 1/4" x 1/4", CPI Single Ferrule Compression x CPI Single Ferrule Compression, 6000 PSIG CWP/50 to 350 PSIG Cracking, 316 Stainless Steel, Fluorocarbon Rubber Seal, Manual Overdrive Handle, Adjustable Pressure, Angle,...
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  • Parker RL4A Series Relief Valve
    4Z-RH4A-BNT-SS-K2 Parker Relief Valve
    4Z-RH4A-BNT-SS-K2

    Parker Hannifin

    Product Type: Relief Valves

    Parker RH4A Series Relief Valve, 1/4" x 1/4", CPI Single Ferrule Compression x CPI Single Ferrule Compression, 6000 PSIG CWP/350 to 750 PSIG Cracking, 316 Stainless Steel, Nitrile Rubber Seal, Adjustable Pressure, Angle, Relief Valve.
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  • Parker RL4A Series Relief Valve
    4Z-RH4A-BNT-SS-K1 Parker Relief Valve
    4Z-RH4A-BNT-SS-K1

    Parker Hannifin

    Product Type: Relief Valves

    Parker RH4A Series Relief Valve, 1/4" x 1/4", CPI Single Ferrule Compression x CPI Single Ferrule Compression, 6000 PSIG CWP/50 to 350 PSIG Cracking, 316 Stainless Steel, Nitrile Rubber Seal, Adjustable Pressure, Angle, Relief Valve.
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  • Parker A-LOK RH4 Series Relief Valve
    4A-RH4A-KZT-SS-K4 Parker RH4 Series Relief Valve
    4A-RH4A-KZT-SS-K4

    Parker Hannifin

    Product Type: Plug Valves

    End 1 Type: Double Ferrule Compression

    End 2 Type: Double Ferrule Compression

    Parker A-LOK RH4 Series Rotary Plug Valve, 1/4" A-LOK® Compression, RH4A Valve Series, Highly Fluorinated Fluorocarbon Rubber Seal, PTFE Back-up Ring, Stainless Steel Body, Automatically Operated.
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  • Parker RH4 Series Relief Valve
    4M4F-RH4A-BNT-SS-K2 Parker RH4 Series Relief Valve
    4M4F-RH4A-BNT-SS-K2

    Parker Hannifin

    Product Type: Plug Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker RH4 Series Rotary Plug Valve, 1/4" Male NPT, 1/4" Female NPT, RH4A Valve Series, Buna-N Rubber Seal, PTFE Back-up Ring, Stainless Steel Body, Automatically Operated.
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  • Parker CPI RH4 Series Relief Valve
    4Z-RH4A-VT-SS-K8-C Parker RH4 Series Relief Valve
    4Z-RH4A-VT-SS-K8-C

    Parker Hannifin

    Product Type: Plug Valves

    End 1 Type: Single Ferrule Compression

    End 2 Type: Single Ferrule Compression

    Parker CPI™ RH4 Series Rotary Plug Valve, 1/4" CPI Compression, RH4A Valve Series, Fluorocarbon Rubber Seal, PTFE Back-up Ring, Stainless Steel Body, Automatically Operated.
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