SUN HYDRAULICS
RDBACCV

***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 RDBACCV (RDBACCV) is a direct-acting relief cartridge valve designed to protect hydraulic components from pressure transients. This normally closed, pressure-limiting valve activates when the inlet port pressure reaches its set threshold, opening to the tank port and throttling flow to control pressure rise. The valve is engineered for smooth, quiet operation with near-zero leakage and is highly resistant to dirt and silting. It features a rapid response time of approximately 2 milliseconds and can handle a maximum operating pressure of 5000 psi (350 bar). The RDBACCV valve is physically and functionally interchangeable with other 2-port relief cartridges of similar frame size, making it versatile for various applications including cross port relief circuits and load holding scenarios. This model accepts maximum pressure at port 2, with back pressure on the tank port directly adding to the valve setting at a 1:1 ratio. The seals on the adjustment screw are exposed to system pressure; therefore, adjustments should be made when the system is unpressurized. For optimal performance, select a spring range where the desired relief setting falls between midrange to high within its minimum and maximum limits. It incorporates Sun's floating style construction, minimizing internal binding risks due to installation torque or machining variations. The RDBACCV has a capacity of 12 gpm (45 L/min) with factory settings established at 4 gpm (15 L/min). It features an installation torque range of 20-25 lbf ft (27-33 Nm) and comes equipped with Viton seals compatible with phosphate ester fluids but not petroleum-based fluids. This robust design makes it relatively insensitive to oil temperature variations and contamination, ensuring reliable performance across diverse hydraulic systems.