Parker Hannifin CO Series Check Valves

Parker's CO Series Check Valves are designed for high integrity, leak proof systems with uni-directional flow control of critical fluids and gases up to 6,000 PSI (414 BAR). These inline check valves are suitable for instrumentation applications requiring high integrity leak rates and re-sealing capabilities.

CO Series

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  • Parker CO Series Check Valve
    4M4F-CO4L-10-V-SS Parker CO Series Check Valve
    4M4F-CO4L-10-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker CO-Series Check Valve, 1/4" Male NPT, 1/4" Female NPT, 10 psig Crack Pressure, Fluorocarbon Rubber Seat, 316 Stainless Steel Body.
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  • Parker CO Series Check Valve
    4M4F-CO4L-100-V-SS-C3 Parker CO Series Check Valve
    4M4F-CO4L-100-V-SS-C3

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker CO-Series Check Valve, 1/4" Male NPT, 1/4" Female NPT, 100 psig Crack Pressure, Fluorocarbon Rubber Seat, 316 Stainless Steel Body.
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  • Parker CO Series Check Valve
    4F-CO4L-5-V-SS Parker CO Series Check Valve
    4F-CO4L-5-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: FNPT

    End 2 Type: FNPT

    Parker CO-Series Check Valve, 1/4" Female NPT, 5 psig Crack Pressure, Fluorocarbon Rubber Seat, 316 Stainless Steel Body.
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  • Parker CO Series Check Valve
    4F-CO4L-10-V-SS Parker CO Series Check Valve
    4F-CO4L-10-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: FNPT

    End 2 Type: FNPT

    Parker CO-Series Check Valve, 1/4" Female NPT, 10 psig Crack Pressure, Fluorocarbon Rubber Seat, 316 Stainless Steel Body.
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  • Parker CO Series Check Valve
    4F-CO4L-1/3-V-SS-C3 Parker CO Series Check Valve
    4F-CO4L-1/3-V-SS-C3

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: FNPT

    End 2 Type: FNPT

    Parker CO-Series Check Valve, 1/4" Female NPT, 1/3 psig Crack Pressure, Fluorocarbon Rubber Seat, 316 Stainless Steel Body.
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  • Parker A-LOK CO Series Check Valve
    4A-CO4L-5-V-SS-C3 Parker CO Series Check Valve
    4A-CO4L-5-V-SS-C3

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: Double Ferrule Compression

    End 2 Type: Double Ferrule Compression

    Parker A-LOK CO-Series Check Valve, 1/4" A-LOK® Compression, 5 psig Crack Pressure, Fluorocarbon Rubber Seat, 316 Stainless Steel Body.
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  • Parker A-LOK CO Series Check Valve
    4A-CO4L-1-V-SS-C3 Parker CO Series Check Valve
    4A-CO4L-1-V-SS-C3

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: Double Ferrule Compression

    End 2 Type: Double Ferrule Compression

    Parker A-LOK CO-Series Check Valve, 1/4" A-LOK® Compression, 1 psig Crack Pressure, Fluorocarbon Rubber Seat, 316 Stainless Steel Body.
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  • Parker A-LOK CO Series Check Valve
    4A-CO4L-100-V-SS Parker CO Series Check Valve
    4A-CO4L-100-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: Double Ferrule Compression

    End 2 Type: Double Ferrule Compression

    Parker A-LOK CO-Series Check Valve, 1/4" A-LOK® Compression, 100 psig Crack Pressure, Fluorocarbon Rubber Seat, 316 Stainless Steel Body.
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