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Department: InstrumentationX
Product Type: ValvesX
Product Sub-Type: Check ValvesX
Product: Check Valve - Inline - COX
Material - Seats: Fluorocarbon rubberX

Trade Name

A-LOK® (51) CPI™ (39)

Series

CO4 (98) CO6 (37) CO8 (45)

Inch/Metric

Inch (174) Metric (6)

Connection Type

Double ferrule compression (42) Female NPT (29) Male NPT (34) Male NPT / Double ferrule compression (9) Male NPT / Female NPT (9) Male NPT / Single ferrule compression (9) Single ferrule compression (30) UltraSeal face seal (8) VacuSeal face seal (10)

Inlet port 1

1/4" A-LOK compression (13) 1/4" CPI compression (11) 1/4" female NPT (11) 1/4" male NPT (40) 1/4" UltraSeal face seal (8) 1/4" VacuSeal face seal (9) 3/8" A-LOK compression (11) 3/8" CPI compression (10) 3/8" female NPT (8) 3/8" male NPT (8) 1/2" A-LOK compression (12) 1/2" CPI compression (9) 1/2" female NPT (10) 1/2" male NPT (13) 1/2" VacuSeal face seal (1) 6mm A-LOK compression (6)

Outlet port 2

1/4" A-LOK compression (22) 1/4" CPI compression (20) 1/4" female NPT (20) 1/4" male NPT (13) 1/4" UltraSeal face seal (8) 1/4" VacuSeal face seal (9) 3/8" A-LOK compression (11) 3/8" CPI compression (10) 3/8" female NPT (8) 3/8" male NPT (8) 1/2" A-LOK compression (12) 1/2" CPI compression (9) 1/2" female NPT (10) 1/2" male NPT (13) 1/2" VacuSeal face seal (1) 6mm A-LOK compression (6)

CV Factor

0.58 (8) 0.62 (90) 1.7 (21) 1.85 (16) 2.65 (45)

Cracking Pressure

1/3 psi (0.02 bar) (28) 1 psi (0.07 bar) (26) 5 psi (0.4 bar) (21) 10 psi (0.7 bar) (23) 25 psi (1.7 bar) (19) 50 psi (3.5 bar) (23) 75 psi (5.2 bar) (18) 100 psi (6.9 bar) (22)

Orifice size

0.180 Inch (4.6mm) (8) 0.187 Inch (4.7mm) (90) 0.281 Inch (7.1mm) (21) 0.328 Inch (8.3mm) (16) 0.406 Inch (10.3mm) (45)

Special Cleaning

Cleaning for oxygen service (38)
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Check Valve - Inline - COCheck Valve - Inline - CO

Check Valve - Inline - CO

Parker Inline Check Valve - CO Series

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Showing 161 - 180 of 180  
Part # Availability Price/UOM
++ 8M-CO8L-5-V-SS Out of Stock - Lead Time Required $243.70
++ 8M-CO8L-10-V-SS Out of Stock - Lead Time Required $241.20
++ 8M-CO8L-25-V-SS Out of Stock - Lead Time Required $243.27
++ 8M-CO8L-25-V-SS-C3 Out of Stock - Lead Time Required $243.58
++ 8M-CO8L-50-V-SS Out of Stock - Lead Time Required $241.92
++ 8M-CO8L-50-V-SS-C3 Out of Stock - Lead Time Required $242.23
++ 8M-CO8L-75-V-SS Out of Stock - Lead Time Required $238.20
++ 8M-CO8L-75-V-SS-C3 Out of Stock - Lead Time Required $238.52
++ 8M-CO8L-100-V-SS Out of Stock - Lead Time Required $256.94
++ 8M-CO8L-100-V-SS-C3 Out of Stock - Lead Time Required $257.25
8V-CO8L-1/3-V-SS N/A Call to Order
++ 8Z-CO8L-1/3-V-SS Out of Stock - Lead Time Required $226.21
++ 8Z-CO8L-1/3-V-SS-C3 Out of Stock - Lead Time Required $226.21
++ 8Z-CO8L-1-V-SS Out of Stock - Lead Time Required $225.33
++ 8Z-CO8L-5-V-SS Out of Stock - Lead Time Required $230.87
++ 8Z-CO8L-10-V-SS Out of Stock - Lead Time Required $228.38
++ 8Z-CO8L-25-V-SS Out of Stock - Lead Time Required $230.45
++ 8Z-CO8L-50-V-SS Out of Stock - Lead Time Required $229.10
++ 8Z-CO8L-75-V-SS Out of Stock - Lead Time Required $225.38
++ 8Z-CO8L-100-V-SS Out of Stock - Lead Time Required $244.12
UOM Inlet port 1 Outlet port 2 Material - Seats Material - Seals Cracking pressure Material Country of Origin (COO) Harmonized Tariff (HTS)
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 5 psi (0.4 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 10 psi (0.7 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 25 psi (1.7 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 25 psi (1.7 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 50 psi (3.5 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 50 psi (3.5 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 75 psi (5.2 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 75 psi (5.2 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 100 psi (6.9 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" male NPT 1/2" male NPT Fluorocarbon rubber Fluorocarbon rubber 100 psi (6.9 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" VacuSeal face seal 1/2" VacuSeal face seal Fluorocarbon rubber Fluorocarbon rubber 1/3 psi (0.02 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" CPI compression 1/2" CPI compression Fluorocarbon rubber Fluorocarbon rubber 1/3 psi (0.02 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" CPI compression 1/2" CPI compression Fluorocarbon rubber Fluorocarbon rubber 1/3 psi (0.02 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" CPI compression 1/2" CPI compression Fluorocarbon rubber Fluorocarbon rubber 1 psi (0.07 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" CPI compression 1/2" CPI compression Fluorocarbon rubber Fluorocarbon rubber 5 psi (0.4 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" CPI compression 1/2" CPI compression Fluorocarbon rubber Fluorocarbon rubber 10 psi (0.7 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" CPI compression 1/2" CPI compression Fluorocarbon rubber Fluorocarbon rubber 25 psi (1.7 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" CPI compression 1/2" CPI compression Fluorocarbon rubber Fluorocarbon rubber 50 psi (3.5 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" CPI compression 1/2" CPI compression Fluorocarbon rubber Fluorocarbon rubber 75 psi (5.2 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
EA 1/2" CPI compression 1/2" CPI compression Fluorocarbon rubber Fluorocarbon rubber 100 psi (6.9 bar) 316 Stainless steel Special request, please call for COO Special request, please call for HTS
8M-CO8L-5-V-SS
Out of Stock - Lead Time Required
$243.70
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

5 psi (0.4 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8M-CO8L-10-V-SS
Out of Stock - Lead Time Required
$241.20
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

10 psi (0.7 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8M-CO8L-25-V-SS
Out of Stock - Lead Time Required
$243.27
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

25 psi (1.7 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8M-CO8L-25-V-SS-C3
Out of Stock - Lead Time Required
$243.58
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

25 psi (1.7 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8M-CO8L-50-V-SS
Out of Stock - Lead Time Required
$241.92
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

50 psi (3.5 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8M-CO8L-50-V-SS-C3
Out of Stock - Lead Time Required
$242.23
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

50 psi (3.5 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8M-CO8L-75-V-SS
Out of Stock - Lead Time Required
$238.20
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

75 psi (5.2 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8M-CO8L-75-V-SS-C3
Out of Stock - Lead Time Required
$238.52
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

75 psi (5.2 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8M-CO8L-100-V-SS
Out of Stock - Lead Time Required
$256.94
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

100 psi (6.9 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8M-CO8L-100-V-SS-C3
Out of Stock - Lead Time Required
$257.25
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" male NPT

1/2" male NPT

Fluorocarbon rubber

Fluorocarbon rubber

100 psi (6.9 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8V-CO8L-1/3-V-SS
N/A
Call to Order
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" VacuSeal face seal

1/2" VacuSeal face seal

Fluorocarbon rubber

Fluorocarbon rubber

1/3 psi (0.02 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8Z-CO8L-1/3-V-SS
Out of Stock - Lead Time Required
$226.21
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" CPI compression

1/2" CPI compression

Fluorocarbon rubber

Fluorocarbon rubber

1/3 psi (0.02 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8Z-CO8L-1/3-V-SS-C3
Out of Stock - Lead Time Required
$226.21
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" CPI compression

1/2" CPI compression

Fluorocarbon rubber

Fluorocarbon rubber

1/3 psi (0.02 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8Z-CO8L-1-V-SS
Out of Stock - Lead Time Required
$225.33
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" CPI compression

1/2" CPI compression

Fluorocarbon rubber

Fluorocarbon rubber

1 psi (0.07 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8Z-CO8L-5-V-SS
Out of Stock - Lead Time Required
$230.87
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" CPI compression

1/2" CPI compression

Fluorocarbon rubber

Fluorocarbon rubber

5 psi (0.4 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8Z-CO8L-10-V-SS
Out of Stock - Lead Time Required
$228.38
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" CPI compression

1/2" CPI compression

Fluorocarbon rubber

Fluorocarbon rubber

10 psi (0.7 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8Z-CO8L-25-V-SS
Out of Stock - Lead Time Required
$230.45
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" CPI compression

1/2" CPI compression

Fluorocarbon rubber

Fluorocarbon rubber

25 psi (1.7 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8Z-CO8L-50-V-SS
Out of Stock - Lead Time Required
$229.10
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" CPI compression

1/2" CPI compression

Fluorocarbon rubber

Fluorocarbon rubber

50 psi (3.5 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8Z-CO8L-75-V-SS
Out of Stock - Lead Time Required
$225.38
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" CPI compression

1/2" CPI compression

Fluorocarbon rubber

Fluorocarbon rubber

75 psi (5.2 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
8Z-CO8L-100-V-SS
Out of Stock - Lead Time Required
$244.12
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seats:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/2" CPI compression

1/2" CPI compression

Fluorocarbon rubber

Fluorocarbon rubber

100 psi (6.9 bar)

316 Stainless steel

Special request, please call for COO

Special request, please call for HTS
Showing 161 - 180 of 180
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.
Parker Instrumentation Check Valves
Parker Instrumentation Check Valves
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