Cat® Check Valve Spring exerts a force to keep the check valve closed when there is no flow and to assist in opening the valve when there is a flow

Cat® Hydraulic Control Check Valve Spring exerts the necessary force to keep the check valve closed under normal conditions, preventing the reverse flow

Cat® Control Valve Plunger Spring functions by exerting force on the plunger, which in turn controls the opening and closing of the hydraulic valve