PARKER CPOM3AAN50

Parker Pilot Operated Check Valve NG10 350 bar

Description

The Parker CPOM3AAN50 is a high-performance, pilot-operated check valve designed for modular hydraulic systems. As part of the reliable CPOM series, this NG10 (CETOP 5 / D05) valve provides leak-free closure in one direction, while allowing free flow in the opposite direction. It is ideal for load holding applications, preventing cylinder drift and ensuring system safety. The valve’s pilot-to-open function allows for controlled release of the held load upon receiving a hydraulic pilot signal. Built for demanding industrial environments, it operates reliably up to a maximum pressure of 350 bar (5000 PSI). Order now from spareparts2day for expert support and fast delivery.

Specifications

• Manufacturer: Parker
• Type: Pilot Operated Check Valve
• Series: CPOM
• Model: CPOM3AAN50
• Size: NG10 / CETOP 5 / D05
• Max. Operating Pressure: 350 bar / 5000 PSI
• Cracking Pressure: 5.0 bar (72.5 PSI)
• Seal Material: NBR (Nitrile)
• Mounting Interface: ISO 4401-05

Label Info

• Model Code: CPOM3AAN50
• max.Pressure: 5000 PSI / 350 bar
• Date Code: LF

Application

This valve is commonly used in hydraulic presses, machine tools, material handling equipment, and mobile machinery where secure load holding and controlled motion are critical. Its modular design allows for easy integration into manifold blocks and valve stacks.

Country of Origin

Made in Slovenia.

CO2 Impact

By purchasing this reused component, you are contributing to a circular economy and helping to avoid 8.0 kg of CO2 emissions associated with the production of a new part.

Availability

This item is in stock and ready for immediate dispatch.

FAQ

What is the function of the pilot line in the CPOM3AAN50 valve?

The pilot line receives an external pressure signal. This signal acts on the pilot piston inside the valve, which unseats the check valve poppet and allows fluid to flow in the reverse direction. Without pilot pressure, it acts as a simple check valve.

Is the 5.0 bar cracking pressure adjustable on this model?

No, the cracking pressure for the CPOM3AAN50 is fixed at 5.0 bar (72.5 PSI) as specified by the model code. Parker offers other versions in the CPOM series with different factory-set cracking pressures if required.

What type of hydraulic fluid is compatible with the Nitrile (NBR) seals in this valve?

The standard Nitrile (NBR) seals are compatible with most common mineral oil-based hydraulic fluids (HL, HLP). They are not recommended for use with synthetic fluids like phosphate esters or water-based fluids, which would require different seal materials like FPM (Viton).

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Last Update: March 13, 2026