SUN HYDRAULICS
RBAECDN

***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 RBAECDN (RBAECDN) is a two-port, pilot-stage, direct-acting relief cartridge designed for 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 surpasses the spring force valve 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 requiring only one cavity to accommodate both control and primary functions. The RBAECDN features hardened poppet and seat components for consistent operation, low leakage rates, and superior wear characteristics. It can handle pressures up to 5000 psi (350 bar) at both ports 1 and 2. The backpressure at port 2 is directly additive to the pressure setting at port 1. This cartridge incorporates Sun's floating style construction to minimize internal binding due to excessive installation torque or machining variations. For systems utilizing phosphate ester fluids, configurations with EPDM seals are available; however, these seals should not be exposed to petroleum-based fluids as they may incur damage. The factory pressure settings are established at a flow rate of 30 cc/min with a maximum operating pressure of 5000 psi (350 bar). The typical response time is approximately 2 milliseconds with a maximum valve leakage of about 15 drops/min (1 cc/min) at standard conditions. Installation requires specific torque values: the main stage valve should be installed first followed by the T8A pilot control section into the main stage valve. The valve hex size measures 7/8 inches (22.2 mm), while adjustment screw internal hex size is set at 5/32 inches (4 mm). A locknut hex size of 9/16 inches (15 mm) requires a torque of between 80-90 lbf-in (9-10 Nm).