Parker Hannifin C400B Check Valve

The Parker Hannifin C400B check valve is a high-pressure hydraulic component rated to 2000 psi, designed to prevent reverse flow in fluid lines and to maintain unidirectional flow in demanding fluid-power systems used across a variety of industrial applications. It functions by allowing fluid to move freely in the forward direction under system pressure while automatically closing to block backflow when pressure on the outlet side rises or the source pressure drops, thereby protecting pumps, actuators, and other components from reverse-flow damage. This model provides a compact form factor and is designed for reliability in demanding hydraulic environments, with a build intended to resist wear in continuous operation. Common uses include high-pressure hydraulic circuits in industrial machinery and equipment where backflow protection is required, and the 2000 psi rating helps indicate suitability for rigorous operating conditions.