SUN HYDRAULICS
RDDAWEN

***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 RDDAWEN (RDDAWEN) is a direct-acting relief cartridge valve designed to protect hydraulic systems from pressure spikes by limiting pressure transients. This valve is normally closed and opens to the tank port when the inlet pressure reaches the preset threshold, allowing for throttling flow to manage pressure rise effectively. It features a smooth and quiet operation with virtually zero leakage, making it dirt tolerant and resistant to silting, ensuring fast response times. The RDDAWEN model is interchangeable with other 2-port relief cartridges of the same frame size, offering compatibility in cross-port relief circuits. Its adjust screw seals are exposed to system pressure, requiring pressure removal for adjustments. The valve maintains stability despite varying oil temperatures and contamination levels. The RDDAWEN is suitable for load-holding applications due to its ability to handle maximum pressures at port 2, with backpressure on the tank port directly adding to the valve setting at a 1:1 ratio. For optimal repeatability, it's recommended to select a spring range where the desired relief setting falls between midrange and high of the minimum and maximum pressures. This model incorporates Sun\u2019s floating style construction to minimize internal binding risks due to installation torque or machining variations. It has a cavity type T-10A, series 1 capacity of 25 gpm (95 L/min), with factory settings established at 4 gpm (15 L/min). The maximum operating pressure is rated at 5000 psi (350 bar), with a typical response time of 2 ms. Maximum valve leakage upon reseat is limited to 10 drops/min (0.7 cc/min), achieving reseat at 90% of setting. The adjustment requires six clockwise turns for increased settings, with specific torque requirements for installation and locknut adjustments provided in detail for precise application needs.