SUN HYDRAULICS
RBADKDN

***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 RBADKDN (RBADKDN) is a direct-acting, pilot relief cartridge that features back-to-back check valves, allowing it to remotely control two other pilot-operated valves or serve as a thermal relief for both ends of an actuator. This valve is designed for use with other valves having comparable pilot flows due to its capacity being limited to pilot flow. The unique back-to-back check valve design prevents cross talk between the two controlled valves, while a single adjustment manages both. With a check cracking pressure of 15 psi (1 bar), this valve is suitable for load holding applications and prevents overpressure caused by thermal expansion of fluid. It employs Sun's floating style construction to reduce the risk of internal parts binding from excessive installation torque or cavity/cartridge machining variations. The RBADKDN fits into a T-11A cavity and belongs to Series 1, with a capacity of 0.25 gpm (1 L/min) and typical response time of 2 ms. Maximum valve leakage at 110 SUS (24 cSt) is minimal at 5 drops/min (0.3 cc/min). The valve's adjustment requires up to five clockwise turns to increase the setting, with specific dimensions provided for installation torque and hex sizes: valve hex size is 7/8 in. (22.2 mm), installation torque ranges from 30-35 lbf ft (41-47 Nm), adjustment screw internal hex size is 5/32 in. (4 mm), locknut hex size is 9/16 in. (15 mm), and locknut torque ranges from 80-90 lbf in. (9-10 Nm). The cartridge uses Viton seals, with seal kit part number 990011006 available for maintenance or replacement needs.