The Sun Hydraulics CKGBXCN is a high-performance, pilot-to-open check valve with a pilot-assist feature, commonly known as a counterbalance valve. It is engineered to control overrunning loads and provide smooth, stable operation in demanding hydraulic circuits. The valve allows free flow from the directional valve at port 2 to the load at port 1, while securely blocking flow in the opposite direction. This load is held in place until sufficient pilot pressure is applied at port 3 to open the valve. The cartridge-style design allows for easy integration into standard T-11A cavities, making it a reliable and versatile solution for mobile and industrial applications requiring precise load-holding and motion control.