Sun Hydraulics is raising the bar once again with new 3:1 Pilot Ratio 0-Series Counterbalance valves—available in model codes CBZA and CAZA. Designed for high-performance motion control, this new series packs exceptional power into a smaller, more efficient footprint, making it ideal for applications where space is tight and quality isn’t up for negotiation. Despite their compact size, the 0-Series cartridge valves deliver Sun-level stability and reliable load holding, all while offering adjustable range options up to 6000 psi (420 bar). With an equal capacity of 7.5 gpm (30 L/min), these valves are built to dominate demanding applications without breaking a sweat.
Model code CBZA with pilot assist is meant to control an overrunning load. The check valve allows free flow from the directional valve (port 2) to the load (port 1) while a direct-acting, pilot-assisted relief valve controls flow from port 1 to port 2. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio.
While both cartridges are designed for the compact T-163A cavity, model code CAZA has an atmospherically referenced spring chamber allowing it to be used in applications with consistently high or dynamic back pressure on Port 2 of the counterbalance valve.
Sun’s new 0-Series counterbalance valves are the newest additions to its counterbalance valve family and boast superior control in today’s toughest hydraulic environments. Higher-pressure capability delivers superior load control in demanding systems.