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.

Shop All Products

CO Series

197 items

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Parker 4M4Z-CO4L-25-V-SS
    4M4Z-CO4L-25-V-SS Parker CO Series O-Ring Poppet Check Valve
    4M4Z-CO4L-25-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: Single Ferrule Compression

    Parker CO-Series O-Ring Poppet Check Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" single ferrule tube fitting (outlet), 25 psig crack pressure, fluorocarbon rubber seal
    Quote Required Request a Quote
    Add to Cart
    Add to Wish List
    Qty in Cart: 0
    Quantity:
    Price:
    Subtotal:
    Add to Cart
  • Parker 4M4Z-CO4L-1-V-SS
    4M4Z-CO4L-1-V-SS Parker CO Series O-Ring Poppet Check Valve
    4M4Z-CO4L-1-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: Single Ferrule Compression

    Parker CO-Series O-Ring Poppet Check Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" single ferrule tube fitting (outlet), 1 psig crack pressure, fluorocarbon rubber seal
    Quote Required Request a Quote
    Add to Cart
    Add to Wish List
    Qty in Cart: 0
    Price:
    Subtotal:
    Choose Options
  • Parker 4M4Z-CO4L-10-V-SS
    4M4Z-CO4L-10-V-SS Parker CO Series O-Ring Poppet Check Valve
    4M4Z-CO4L-10-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: Single Ferrule Compression

    Parker CO-Series O-Ring Poppet Check Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" single ferrule tube fitting (outlet), 10 psig crack pressure, fluorocarbon rubber seal
    Quote Required Request a Quote
    Add to Cart
    Add to Wish List
    Qty in Cart: 0
    Price:
    Subtotal:
    Choose Options
  • Parker 4M4Z-CO4L-100-V-SS
    4M4Z-CO4L-100-V-SS Parker CO Series O-Ring Poppet Check Valve
    4M4Z-CO4L-100-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: Single Ferrule Compression

    Parker CO-Series O-Ring Poppet Check Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" single ferrule tube fitting (outlet), 100 psig crack pressure, fluorocarbon rubber seal
    Quote Required Request a Quote
    Add to Cart
    Add to Wish List
    Qty in Cart: 0
    Quantity:
    Price:
    Subtotal:
    Add to Cart
  • Parker 4M4Z-CO4L-1/3-V-SS
    4M4Z-CO4L-1/3-V-SS Parker CO Series O-Ring Poppet Check Valve
    4M4Z-CO4L-1/3-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: Single Ferrule Compression

    Parker CO-Series O-Ring Poppet Check Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" single ferrule tube fitting (outlet), 1/3 psig crack pressure, fluorocarbon rubber seal
    Quote Required Request a Quote
    Add to Cart
    Add to Wish List
    Qty in Cart: 0
    Price:
    Subtotal:
    Choose Options
  • Parker 4M4Z-CO4L-1/3-BN-SS
    4M4Z-CO4L-1/3-BN-SS Parker CO Series O-Ring Poppet Check Valve
    4M4Z-CO4L-1/3-BN-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: Single Ferrule Compression

    Parker CO-Series O-Ring Poppet Check Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" single ferrule tube fitting (outlet), 1/3 psig crack pressure, Buna-N rubber seal
    Quote Required Request a Quote
    Add to Cart
    Add to Wish List
    Qty in Cart: 0
    Quantity:
    Price:
    Subtotal:
    Add to Cart
  • Parker 4M4F-CO4L-5-V-SS
    4M4F-CO4L-5-V-SS Parker CO-Series O-Ring Poppet Check Valve
    4M4F-CO4L-5-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker CO-Series O-Ring Poppet Check Valve, 316 SS body, 1/4 MNPT inlet x 1/4" FNPT outlet, 5 psig crack pressure, fluorocarbon rubber seal
    Quote Required Request a Quote
    Add to Cart
    Add to Wish List
    Qty in Cart: 0
    Price:
    Subtotal:
    Choose Options
  • Parker 4M4F-CO4L-25-V-SS
    4M4F-CO4L-25-V-SS Parker CO Series O-Ring Poppet Check Valve
    4M4F-CO4L-25-V-SS

    Parker Hannifin

    Product Type: Check Valves

    End 1 Type: MNPT

    End 2 Type: FNPT

    Parker CO-Series O-Ring Poppet Check Valve, 316 SS body, 1/4" MNPT (inlet) x 1/4" FNPT (outlet), 25 psig crack pressure, fluorocarbon rubber seal
    Quote Required Request a Quote
    Add to Cart
    Add to Wish List
    Qty in Cart: 0
    Quantity:
    Price:
    Subtotal:
    Add to Cart
  • Total: items /

Adding your products to cart

View Cart Continue to Shopping
loader

Please wait while the screen is loading