SUN HYDRAULICS
RDBAKEV

***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 RDBAKEV (RDBAKEV) is a direct-acting relief cartridge designed to protect hydraulic components by limiting pressure transients. This normally closed valve opens when the inlet pressure reaches the set point, allowing flow to the tank port and controlling pressure rise. It features a smooth and quiet operation with nearly zero leakage, making it highly reliable and dirt tolerant. The RDBAKEV is interchangeable with other 2-port relief cartridges of the same frame size, offering flexibility in various applications, including load holding and cross-port relief circuits. It can handle maximum pressure at port 2 and is relatively unaffected by varying oil temperatures or contamination. The valve's adjustment requires system pressure to be removed, with settings adjusted via a screw exposed to system pressure. Optimal performance is achieved by selecting a spring range where the desired setting falls in the mid-to-high range of its capacity. The valve's backpressure on tank port 2 directly adds to the setting at a 1:1 ratio, ensuring precision in operation. The RDBAKEV incorporates Sun\u2019s floating style construction to prevent internal binding due to installation torque or machining variations. With EPDM seals, it is suitable for systems using phosphate ester fluids but should not be exposed to petroleum-based substances. It has a capacity of 12 gpm (45 L/min) and operates at pressures up to 5000 psi (350 bar), with a typical response time of 2 ms. The valve\u2019s reseat occurs at 85% of its setting, ensuring consistent performance. Installation requires specific torque values for both the valve and locknut adjustments, contributing to its robust design suitable for demanding hydraulic systems.