SUN HYDRAULICS
RDBALCE

***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 RDBALCE (RDBALCE) is a direct-acting relief cartridge valve designed to protect hydraulic components from pressure transients. This normally closed, pressure-limiting valve operates by opening to the tank port when the inlet port pressure reaches the set threshold, effectively throttling flow to control pressure rise. Notable for its smooth and quiet operation, the valve is virtually leak-proof, dirt-tolerant, and immune to silting, ensuring rapid response times. It is compatible with cross-port relief circuits due to its ability to accept maximum pressure at port 2. The valve's adjust screw seals are exposed to system pressure, necessitating adjustment only when the system is depressurized. For optimal performance and repeatability, select a spring range where the desired relief setting falls between midrange and high pressures. The valve remains stable across varying oil temperatures and contamination levels and is suitable for load-holding applications. The back pressure on port 2 directly adds to the valve setting at a 1:1 ratio. This model incorporates Sun Hydraulics' floating style construction, minimizing internal part binding risks due to excessive installation torque or machining variations. It features a cavity size of T-162A with a series 0 capacity of 12 gpm (45 L/min) and can operate at a maximum pressure of 5000 psi (350 bar). Its typical response time is approximately 2 ms with a maximum leakage rate of 10 drops/min at reseat conditions. The reseat occurs at 85% of the set value. Adjustments can be made using an internal hex size of 5/32 in (4 mm), with locknut torque specified between 80-90 lbf-in (9-10 Nm). The cartridge weight is .20 lb (.10 kg), and it supports EPDM seals for use with phosphate ester fluids while being unsuitable for petroleum-based fluids or lubricants.