SUN HYDRAULICS
RDFAKEN

***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 RDFAKEN (RDFAKEN) is a direct-acting relief cartridge designed to protect hydraulic components from pressure transients by limiting pressure rise when the inlet port reaches the valve setting. This valve opens to the tank port, throttling flow smoothly and quietly, with essentially zero leakage. It is dirt tolerant, immune to silting, and offers fast response times. All 2-port relief cartridges from Sun Hydraulics are interchangeable within the same frame size, allowing for versatile use in various hydraulic systems. The RDFAKEN model can accept maximum pressure at port 2, making it suitable for cross-port relief circuits and load-holding applications. The valve is relatively insensitive to oil temperature variations and contamination. The adjustment of this valve requires pressure removal due to system exposure on the adjust screw seals. Optimal performance is achieved by selecting a spring range where the desired relief setting falls between midrange and high of its minimum and maximum pressure capabilities. Back pressure on port 2 adds directly to the valve setting at a 1:1 ratio. Configurations with EPDM seals are specifically for phosphate ester fluid systems, as exposure to petroleum-based substances can cause seal damage. This model incorporates Sun's floating style construction to minimize internal part binding due to installation torque or machining variations. The RDFAKEN has a capacity of 50 gpm (200 L/min) with a maximum operating pressure of 5000 psi (350 bar). It features a typical response time of 2 ms and has minimal leakage at reseat conditions. With factory settings established at 4 gpm (15 L/min), it ensures reliable performance across various applications requiring precise pressure control in hydraulic systems.