SUN HYDRAULICS
RBAEKBN

***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 RBAEKBN (RBAEKBN) is a two-port, pilot-stage, direct-acting relief cartridge designed for precise pressure regulation in hydraulic systems. This normally closed valve is fully adjustable and opens a flow path from port 1 to port 2 when the inlet pressure at port 1 exceeds the spring force setting. It utilizes the Sun T8A two-port cavity, making it ideal for integration with Sun's main stage pilot or vent-to-operate cartridges, eliminating the need for separate pilot lines and reducing machining requirements to accommodate both control and primary functions. Notably, all two-position, two-way pilot stage control cartridges share the same cavity and are physically interchangeable based on functionality. The RBAEKBN supports pressure levels up to 5000 psi (350 bar) at ports 1 and 2. Its hardened poppet and seat ensure consistent operation with low leakage rates and superior wear characteristics. The backpressure at port 2 is directly additive to the pressure setting at port 1. Cartridges configured with EPDM seals are compatible with phosphate ester fluids but can be damaged by petroleum-based fluids or lubricants. The valve's floating style construction minimizes internal part binding due to excessive installation torque or machining variations. Key specifications include a capacity of 2.5 gpm (10 L/min), maximum operating pressure of 5000 psi (350 bar), typical response time of 2 ms, and maximum valve leakage of 15 drops/min (1 cc/min). Installation requires a torque of 20\u201325 lbf ft (27\u201333 Nm) for the valve hex size of 7/8 in. (22.2 mm), while adjustment screw internal hex size is set at 5/32 in. (4 mm). The locknut torque is specified between 80\u201390 lbf in. (9\u201310 Nm). The Sun Hydraulics RBAEKBN offers reliable performance for applications requiring robust direct-acting relief functionality within hydraulic systems.