SUN HYDRAULICS
RBADCDN

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics RBADCDN (RBADCDN) is a direct-acting, pilot relief cartridge designed with back-to-back check valves. This configuration enables the valve to remotely control two other pilot-operated valves or function as a thermal relief for both ends of an actuator. It is essential to pair this valve with others that have comparable pilot flows due to its capacity being limited to pilot flow. The back-to-back check valves are instrumental in preventing cross-talk between the two remote-controlled valves, ensuring efficient operation. A single adjustment controls both valves, simplifying setup and usage. The check cracking pressure of the RBADCDN is set at 15 psi (1 bar), and pressure at port 3 is directly additive to the valve setting, which is beneficial for load-holding applications. The thermal relief feature prevents overpressure caused by thermal fluid expansion, enhancing system safety and reliability. Furthermore, the valve incorporates Sun's floating style construction, minimizing potential internal part binding due to excessive installation torque or variations in cavity/cartridge machining. Key specifications include a capacity of 0.25 gpm (1 L/min), typical response time of 2 ms, and maximum valve leakage at 110 SUS (24 cSt) of 5 drops/min (0.3 cc/min). The adjustment screw requires five clockwise turns to increase setting, with an internal hex size of 5/32 in (4 mm). Installation requires a valve hex size of 7/8 in (22.2 mm) and torque between 30-35 lbf ft (41-47 Nm), while the locknut hex size is 9/16 in (15 mm) with a torque range of 80-90 lbf in (9-10 Nm). The seal kit for this cartridge uses Viton material under part number 990011006.