SUN HYDRAULICS
RDBACSN

***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 RDBACSN (RDBACSN) is a direct-acting relief cartridge designed to protect hydraulic components from pressure transients. This normally closed, pressure-limiting valve opens to the tank port when the inlet pressure reaches the set threshold, effectively throttling flow to prevent excessive pressure rise. Known for its smooth and quiet operation, the valve exhibits nearly zero leakage, high dirt tolerance, and rapid response time of approximately 2 milliseconds. The RDBACSN model is interchangeable with other 2-port relief cartridges of the same frame size and flow path, allowing for versatile application in hydraulic systems. This valve is particularly suitable for use in cross port relief circuits and load holding applications due to its ability to withstand maximum pressure at port 2. The adjustment process requires system pressure removal before altering settings, which ensures precise calibration. The valve's performance remains stable despite changes in oil temperature or contamination levels. It features a floating style construction that reduces the risk of internal component binding due to installation torque or machining variations. Operating with a maximum capacity of 12 gpm (45 L/min) and a maximum operating pressure of 5000 psi (350 bar), this cartridge provides reliable performance across various settings. It incorporates EPDM seals compatible with phosphate ester fluids but cautions against exposure to petroleum-based substances. With a factory pressure setting established at 4 gpm (15 L/min), it ensures repeatability by selecting a spring range where desired relief settings fall mid-to-high within the minimum and maximum pressures. The RDBACSN model's compact design includes specific dimensions such as a valve hex size of 3/4 inch (19.1 mm) and an installation torque range between 20-25 lbf ft (27-33 Nm). Its locknut torque is set between 80-90 lbf in (9-10 Nm), ensuring secure installation in various hydraulic applications.