SUN HYDRAULICS
RBADKEV

***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 RBADKEV (Material Number: RBADKEV) 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 serve 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 effectively prevent cross-talk between the two controlled valves, and a single adjustment can manage both valves simultaneously. The valve features a check cracking pressure of 15 psi (1 bar), and any pressure at port 3 adds directly to the valve setting, making it suitable for load-holding applications. Thermal relief functionality prevents overpressure caused by thermal fluid expansion. The RBADKEV incorporates Sun's floating style construction, which minimizes the risk of internal parts binding due to excessive installation torque or variations in cavity/cartridge machining. Key specifications include a cavity type T-11A, Series 1, with a capacity of 0.25 gpm (1 L/min) and a typical response time of 2 ms. Maximum valve leakage at 110 SUS (24 cSt) is limited to 5 drops/min (0.3 cc/min). The adjustment requires five clockwise turns to increase the setting, with various hex sizes specified for different components: valve hex size at 7/8 in (22.2 mm), adjustment screw internal hex size at 5/32 in (4 mm), and locknut hex size at 9/16 in (15 mm). Installation torque ranges from 30-35 lbf ft (41-47 Nm), while locknut torque is between 80-90 lbf in (9-10 Nm). The seal kit for this cartridge utilizes Viton material under part number 990011006.