SUN HYDRAULICS
RBAELBN

***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 RBAELBN (RBAELBN) is a two-port, pilot-stage, direct-acting relief cartridge designed as a fully adjustable, normally closed pressure regulating valve. This component effectively manages hydraulic pressure by opening a flow path from port 1 to port 2 when the inlet pressure at port 1 surpasses the spring force setting. The valve utilizes the Sun T-8A two-port cavity, making it an optimal choice for use alongside Sun's main stage pilot or vent-to-operate cartridges. This design eliminates the need for separate pilot lines and requires machining only one cavity 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; functionality is the primary consideration. Key specifications include a maximum operating pressure of 5000 psi (350 bar), with ports 1 and 2 capable of handling this pressure. The valve features a hardened poppet and seat for consistent operation, low leakage rates, and superior wear characteristics. The backpressure at port 2 is directly additive to the pressure setting at port 1. Configurations with EPDM seals are suitable for systems using phosphate ester fluids but are not compatible with petroleum-based fluids. The Sun floating style construction minimizes internal part binding due to excessive installation torque or machining variations. Additional specifications include a capacity of 2.5 gpm (10 L/min), factory pressure settings established at 2 in/min (30 cc/min), typical response time of 2 ms, maximum valve leakage at 110 SUS (24 cSt) of 15 drops/min (1 cc/min), installation torque of 20-25 lbf ft (27-33 Nm), adjustment screw internal hex size of 5/32 in. (4 mm), locknut hex size of 9/16 in. (15 mm), and locknut torque range between 80-90 lbf in. (9-10 Nm).