Parker CO Check Valves – Up to 414 bar and 204°C (Inch)

Parker CO Series Check Valves – Precision and Reliable Flow Control

Parker's CO Series check valves are engineered for high-integrity, one-way flow control of gases and liquids in critical industries such as chemical processing, oil & gas, power generation, and pharmaceuticals. These valves are ideal for applications requiring bubble-tight sealing, low leakage rates, and consistent resealing performance.

The CO Series features a robust poppet design and is 100% factory tested for both cracking and resealing. This ensures consistent performance throughout the valve's service life.

Key Features:

• Pressure rating up to 414 bar (6000 psig)
• Temperature rated up to 204°C (400°F)
• Constructed from 316 stainless steel for superior corrosion resistance
• Cracking pressures of 1/3, 1, 5, 10, or 25 psi
• Orifice sizes ranging from 4.0 mm to 10.3 mm
• Cv values from 0.43 to 2.65 for excellent flow capacity

Available Seal Materials:

• Fluorocarbon (FKM)
• Nitrile (NBR)
• Ethylene Propylene Rubber (EPR)
• Highly Fluorinated Fluorocarbon (FFKM)

Valves connect via NPT, CPI™, A-LOK®, or VacuSeal and include heat code traceability for quality assurance. Oxygen cleaning per ASTM G93 Level C is available for use in oxygen-enriched environments.

Parker also offers repair kits to extend service life, making the CO Series a cost-effective and sustainable solution for high-performance flow control in demanding applications.