SUN HYDRAULICS
RDJACWV

***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 RDJACWV (Material Number: RDJACWV) 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 port pressure reaches the valve setting, thus throttling flow to limit pressure rise. Known for its smooth and quiet operation, this valve is essentially zero-leak, dirt tolerant, immune to silting, and offers rapid response times. It features interchangeable 2-port relief cartridges for a given frame size and is suitable for cross-port relief circuits. The valve's adjust screw seals are exposed to system pressure, necessitating adjustments only when pressure is removed. It is relatively insensitive to varying oil temperatures and contamination, making it ideal for load-holding applications. The back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. Cartridges with EPDM seals are compatible with systems using phosphate ester fluids but must avoid petroleum-based substances. Incorporating Sun's floating style construction minimizes internal binding risks due to installation torque or machining variations. Key specifications include a cavity type of T-18A Series 4 with a capacity of 200 gpm (760 L/min), maximum operating pressure of 5000 psi (350 bar), typical response time of 2 ms, and maximum leakage at reseat of 10 drops/min (0.7 cc/min). The valve reseats at 90% of the setting and features an adjustment range requiring approximately five clockwise turns for increased settings. It has a hex size of 1-5/8 inches (41.3 mm) and installation torque between 350-375 lbf-ft (474-508 Nm). The model weighs 3.30 lb (1.50 kg) and includes a Viton seal kit under part number 990318006.