SUN HYDRAULICS
RDJALCN

***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 RDJALCN (Material Number: RDJALCN) is a direct-acting relief cartridge valve designed to protect hydraulic components from pressure transients. These normally closed, pressure-limiting valves are engineered to open and throttle flow to the tank port when the inlet port pressure reaches the valve setting, effectively limiting pressure rise. The RDJALCN is known for its smooth, quiet operation with essentially zero leakage and high dirt tolerance. It is immune to silting and offers rapid response times, typically around 2 milliseconds. This model is interchangeable with other 2-port relief cartridges of the same frame size and flow path, providing versatility in various applications. The valve can handle maximum pressures up to 5000 psi (350 bar) and has a capacity of 200 gpm (760 L/min). It features a floating style construction that minimizes internal binding due to excessive installation torque or machining variations. The RDJALCN is suitable for load-holding applications and can be used in cross-port relief circuits as it accepts maximum pressure at port 2. Backpressure on the tank port directly adds to the valve setting at a 1:1 ratio, ensuring reliable performance. This model incorporates seals on the adjust screw exposed to system pressure, requiring pressure removal before adjustments. The valve's repeatability is optimized by selecting a spring range where the desired relief setting falls in the mid-to-high range between minimum and maximum pressures. For systems using phosphate ester fluids, cartridges configured with EPDM seals are available but should not be exposed to petroleum-based fluids as they may cause damage. With an installation torque of 350-375 lbf ft (474-508 Nm) and a weight of 3.30 lb (1.50 kg), this robust valve offers dependable performance across varying oil temperatures and contamination levels, making it an ideal choice for diverse hydraulic applications.