Parker Autoclave CKO Series O-Ring Check Valves

High Pressure - Pressures to 60,000 psi (4140 bar)

Provide unidirectional flow and tight shut-off for liquids and gases with high reliability. When differential drops below cracking pressure*, valve shuts off. (Not for use as relief valve.)

Cracking Pressure*: 20 psi (1.38 bar) ±30%. Springs for higher cracking pressures up to 100 psi available on special order for O-ring style check valves only.

Temperature Range/O-ring Options:
Viton (FKM) O-ring (std.): 0° to 400°F (-18° to 204°C) Buna-N O-ring (-BO suffix): -20° to 250°F (-29° to 121°C) FFKM O-ring (-KO suffix): 30° to 500°F *(-18° to 260°C) PTFE O-ring (-TO suffix): -100° to 400°F (-73° to 204°C) PTFE O-ring with Low Temp Spring (-LTTO suffix): to -423°F (-252°C)

CKO Series

3 items

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  • Parker CKO9900 O-Ring Check Valve
    CKO9900

    Parker Hannifin

    Product Type: Check Valves

    Parker Instrumentation CKO Series O-Ring Check Valve, 9/16", F562C High Pressure, 60000 PSI, 316 Stainless Steel, O-Ring Check Valve.
    Qty in Cart: 0
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  • Parker CKO4400 O-Ring Check Valve
    CKO4400

    Parker Hannifin

    Product Type: Check Valves

    Parker Instrumentation CKO Series O-Ring Check Valve, 1/4", F250C High Pressure, 60000 PSI, 316 Stainless Steel, O-Ring Check Valve.
    Qty in Cart: 0
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  • Parker CKO6600 O-Ring Check Valve
    CKO6600

    Parker Hannifin

    Product Type: Check Valves

    Parker Instrumentation CKO Series O-Ring Check Valve, 3/8", F375C High Pressure, 60000 PSI, 316 Stainless Steel, O-Ring Check Valve.
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