SUN HYDRAULICS
RBADLDN

***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 RBADLDN (RBADLDN) is a direct-acting, pilot relief cartridge designed with back-to-back check valves, enabling it to remotely control two other pilot-operated valves or function as a thermal relief for both ends of an actuator. This valve is particularly suitable for load-holding applications due to its ability to prevent overpressure caused by thermal expansion of fluid. It features a check cracking pressure of 15 psi (1 bar), and the pressure at port 3 is directly additive to the valve setting, allowing for precise control. The valve's construction incorporates Sun's floating style design, minimizing the risk of internal parts binding due to excessive installation torque or cavity/cartridge machining variations. This cartridge has a capacity of 0.25 gpm (1 L/min) and a typical response time of 2 ms, making it suitable for applications requiring quick reaction times. The maximum valve leakage at 110 SUS (24 cSt) is limited to 5 drops/min (0.3 cc/min), ensuring efficient operation without significant fluid loss. For adjustments, it requires five clockwise turns to increase the setting and includes an adjustment screw with an internal hex size of 5/32 in. (4 mm). The locknut hex size is 9/16 in. (15 mm), with a locknut torque specification between 80 - 90 lbf in. (9 - 10 Nm). The RBADLDN model should be used in conjunction with other valves that have comparable pilot flows due to its capacity limitations being restricted to pilot flow only. Its design effectively prevents cross-talk between the two controlled valves and allows one adjustment to manage both, providing streamlined control in complex hydraulic systems.