The Sun NCCBLCN is a high-performance counterbalance valve designed for controlling overrunning loads. As a pilot-to-open check valve with a pilot assist feature, it allows free flow from the directional valve (port 2) to the load (port 1) while providing a pilot-assisted, adjustable relief function in the reverse direction. This valve is ideal for applications requiring smooth and stable motion control, preventing load runaway in systems such as winches, boom lifts, and cylinder positioning. Its robust construction ensures reliability and a long service life in demanding hydraulic circuits, offering precise control and safety up to 5000 psi.