Innovative Motion Control and Fluid Handling Products and Solutions
Refine
FILTERSClear All

Series

Inch/Metric

Inlet port 1

Outlet port 2

CV Factor

Material - Seats

Coded label color

Cracking Pressure

Material - Seals

Operating Temperature

Orifice size

Special Cleaning

Click Image to Zoom
Check Valve - Inline - COCheck Valve - Inline - CO

Check Valve - Inline - CO

Parker Inline Check Valve - CO Series

Email this page to a friend


Showing 1 - 20 of 134
Part # Availability Price/UOM
++ 4A-CO4L-1/3-BN-SS Lead Time Required $118.15
4A-CO4L-1/3-BN-SS-C3 N/A Call to Order
++ 4A-CO4L-1/3-EPR-SS Lead Time Required $138.80
++ 4A-CO4L-1/3-KZ-SS Lead Time Required $224.50
++ 4A-CO4L-1/3-KZ-SS-C3 Lead Time Required $254.83
++ 4A-CO4L-1/3-V-SS Lead Time Required $129.90
++ 4A-CO4L-1/3-V-SS-C3 Lead Time Required $160.23
++ 4A-CO4L-1-BN-SS Lead Time Required $104.43
++ 4A-CO4L-1-EPR-SS Lead Time Required $138.80
++ 4A-CO4L-1-EPR-SS-C3 Lead Time Required $169.17
++ 4A-CO4L-1-KZ-SS Lead Time Required $224.50
++ 4A-CO4L-1-V-SS In Stock $129.90
++ 4A-CO4L-1-V-SS-C3 Lead Time Required $160.23
++ 4A-CO4L-5-BN-SS Lead Time Required $138.32
++ 4A-CO4L-5-BN-SS-C3 Lead Time Required $160.63
++ 4A-CO4L-5-EPR-SS Lead Time Required $145.56
++ 4A-CO4L-5-KZ-SS Lead Time Required $235.91
++ 4A-CO4L-5-V-SS Lead Time Required $129.90
++ 4A-CO4L-5-V-SS-C3 Lead Time Required $116.99
++ 4A-CO4L-10-BN-SS Lead Time Required $104.43
UOM Inlet port 1 Outlet port 2 Material - Seats Material - Seals Cracking pressure Material
EA 1/4" A-LOK compression 1/4" A-LOK compression Nitrile rubber Nitrile rubber 1/3 psi (0.02 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Nitrile rubber Nitrile rubber 1/3 psi (0.02 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Ethylene propylene rubber Ethylene propylene rubber 1/3 psi (0.02 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Highly fluorinated fluorocarbon rubber Highly fluorinated fluorocarbon rubber 1/3 psi (0.02 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Highly fluorinated fluorocarbon rubber Highly fluorinated fluorocarbon rubber 1/3 psi (0.02 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Fluorocarbon rubber Fluorocarbon rubber 1/3 psi (0.02 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Fluorocarbon rubber Fluorocarbon rubber 1/3 psi (0.02 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Nitrile rubber Nitrile rubber 1 psi (0.07 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Ethylene propylene rubber Ethylene propylene rubber 1 psi (0.07 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Ethylene propylene rubber Ethylene propylene rubber 1 psi (0.07 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Highly fluorinated fluorocarbon rubber Highly fluorinated fluorocarbon rubber 1 psi (0.07 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Fluorocarbon rubber Fluorocarbon rubber 1 psi (0.07 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Fluorocarbon rubber Fluorocarbon rubber 1 psi (0.07 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Nitrile rubber Nitrile rubber 5 psi (0.4 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Nitrile rubber Nitrile rubber 5 psi (0.4 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Ethylene propylene rubber Ethylene propylene rubber 5 psi (0.4 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Highly fluorinated fluorocarbon rubber Highly fluorinated fluorocarbon rubber 5 psi (0.4 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Fluorocarbon rubber Fluorocarbon rubber 5 psi (0.4 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Fluorocarbon rubber Fluorocarbon rubber 5 psi (0.4 bar) 316 Stainless steel
EA 1/4" A-LOK compression 1/4" A-LOK compression Nitrile rubber Nitrile rubber 10 psi (0.7 bar) 316 Stainless steel
4A-CO4L-1/3-BN-SS
Lead Time Required
$118.15

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Nitrile rubber

Nitrile rubber

1/3 psi (0.02 bar)

316 Stainless steel

4A-CO4L-1/3-BN-SS-C3
N/A
Call to Order

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Nitrile rubber

Nitrile rubber

1/3 psi (0.02 bar)

316 Stainless steel

4A-CO4L-1/3-EPR-SS
Lead Time Required
$138.80

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Ethylene propylene rubber

Ethylene propylene rubber

1/3 psi (0.02 bar)

316 Stainless steel

4A-CO4L-1/3-KZ-SS
Lead Time Required
$224.50

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Highly fluorinated fluorocarbon rubber

Highly fluorinated fluorocarbon rubber

1/3 psi (0.02 bar)

316 Stainless steel

4A-CO4L-1/3-KZ-SS-C3
Lead Time Required
$254.83

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Highly fluorinated fluorocarbon rubber

Highly fluorinated fluorocarbon rubber

1/3 psi (0.02 bar)

316 Stainless steel

4A-CO4L-1/3-V-SS
Lead Time Required
$129.90

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Fluorocarbon rubber

Fluorocarbon rubber

1/3 psi (0.02 bar)

316 Stainless steel

4A-CO4L-1/3-V-SS-C3
Lead Time Required
$160.23

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Fluorocarbon rubber

Fluorocarbon rubber

1/3 psi (0.02 bar)

316 Stainless steel

4A-CO4L-1-BN-SS
Lead Time Required
$104.43

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Nitrile rubber

Nitrile rubber

1 psi (0.07 bar)

316 Stainless steel

4A-CO4L-1-EPR-SS
Lead Time Required
$138.80

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Ethylene propylene rubber

Ethylene propylene rubber

1 psi (0.07 bar)

316 Stainless steel

4A-CO4L-1-EPR-SS-C3
Lead Time Required
$169.17

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Ethylene propylene rubber

Ethylene propylene rubber

1 psi (0.07 bar)

316 Stainless steel

4A-CO4L-1-KZ-SS
Lead Time Required
$224.50

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Highly fluorinated fluorocarbon rubber

Highly fluorinated fluorocarbon rubber

1 psi (0.07 bar)

316 Stainless steel

4A-CO4L-1-V-SS
In Stock
$129.90

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Fluorocarbon rubber

Fluorocarbon rubber

1 psi (0.07 bar)

316 Stainless steel

4A-CO4L-1-V-SS-C3
Lead Time Required
$160.23

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Fluorocarbon rubber

Fluorocarbon rubber

1 psi (0.07 bar)

316 Stainless steel

4A-CO4L-5-BN-SS
Lead Time Required
$138.32

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Nitrile rubber

Nitrile rubber

5 psi (0.4 bar)

316 Stainless steel

4A-CO4L-5-BN-SS-C3
Lead Time Required
$160.63

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Nitrile rubber

Nitrile rubber

5 psi (0.4 bar)

316 Stainless steel

4A-CO4L-5-EPR-SS
Lead Time Required
$145.56

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Ethylene propylene rubber

Ethylene propylene rubber

5 psi (0.4 bar)

316 Stainless steel

4A-CO4L-5-KZ-SS
Lead Time Required
$235.91

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Highly fluorinated fluorocarbon rubber

Highly fluorinated fluorocarbon rubber

5 psi (0.4 bar)

316 Stainless steel

4A-CO4L-5-V-SS
Lead Time Required
$129.90

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Fluorocarbon rubber

Fluorocarbon rubber

5 psi (0.4 bar)

316 Stainless steel

4A-CO4L-5-V-SS-C3
Lead Time Required
$116.99

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Fluorocarbon rubber

Fluorocarbon rubber

5 psi (0.4 bar)

316 Stainless steel

4A-CO4L-10-BN-SS
Lead Time Required
$104.43

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

EA

1/4" A-LOK compression

1/4" A-LOK compression

Nitrile rubber

Nitrile rubber

10 psi (0.7 bar)

316 Stainless steel

Showing 1 - 20 of 134
Parker CO Series Check Valves are designed for uni-directional flow control of fluids and gases in industries such as chemical processing, oil and gas production and transmission, pharmaceutical, pulp and paper, power and utilities. The CO Series is particularly suitable for applications requiring high integrity leak rates and re-sealing capabilities.

Application: In the key markets of chemical & refining, food, beverage & dairy, medical & dental, microelectronics, oil & gas, and power generation.
Updating...