Description:Cat® Check Valves are designed to provide a uni-directional fluid flow and to prevent back flow. They are basically a one-way valve, in which the flow can run freely one way, but if the flow turns, the valve will close to protect the piping, other valves, and pumps.Application:Cat® Check Valves are designed to control fluid flow in hydraulic fluid lines in Cat equipment and are application specific. Consult your owner's manual or contact your local Cat Dealer for more information.