4CKD90-1-S

The 4CKD90-1-S check valve is produced by Vickers for the Check Valves series and is intended to block reverse flow in automated hydraulic circuits. It installs as a screw-in cartridge, so technicians thread it directly into cavity A12336 to reduce assembly time and keep manifolds compact. A pressure rating of 350 bar allows the valve to operate in high-pressure lines typical of mobile or industrial equipment. The rated flow capacity of 90 L/min supports medium-sized actuators without excessive pressure drop. By integrating these capabilities, the valve supplies a reliable one-way path for oil while resisting the service loads encountered in demanding automation systems.

A leakage specification of 0.3 cc/min limits internal bypass and helps hold downstream loads when the valve is closed. Overall height is 31.979 mm (1.259 in), enabling close stacking of components inside low-profile manifolds. Three valve ports provide a pilot path in addition to the main inlet and outlet, which increases circuit flexibility. There is no pilot piston seal, eliminating a potential wear item and simplifying maintenance. Because the porting style is cartridge only, the valve is used with a separate manifold block rather than a threaded housing, allowing designers to customize port layouts for specific hydraulic automation schemes.