SUN HYDRAULICS
RBAECCN

***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 RBAECCN (RBAECCN) is a two-port, pilot-stage, direct-acting relief cartridge designed to function as a fully adjustable, normally closed pressure regulating valve. This robust component operates by opening a flow path from port 1 to port 2 when the inlet pressure at port 1 surpasses the spring force setting of the valve. It utilizes the Sun T8A two-port cavity, making it an ideal choice for integration with Sun's main stage pilot or vent-to-operate cartridges. This design eliminates the need for separate pilot lines and requires only one cavity to accommodate both control and primary functions, although functionality must be considered due to physical interchangeability among similar cartridges. The RBAECCN can handle pressures up to 5000 psi (350 bar) at ports 1 and 2. It features hardened poppet and seat components that ensure consistent operation, low leakage rates, and superior wear resistance. Notably, backpressure at port 2 is directly additive to the pressure setting at port 1. Cartridges configured with EPDM seals are suitable for systems using phosphate ester fluids but should avoid exposure to petroleum-based substances. Incorporating Sun's floating style construction minimizes binding risks due to excessive installation torque or machining variations in the cavity/cartridge interface. The cartridge has a capacity of 2.5 gpm (10 L/min) with a typical response time of 2 ms and maximum valve leakage of 15 drops/min (1 cc/min). Installation specifications include a valve hex size of 7/8 in. (22.2 mm), an installation torque range of 20-25 lbf ft (27-33 Nm), an adjustment screw internal hex size of 5/32 in. (4 mm), and a locknut hex size of 9/16 in. (15 mm) requiring a torque of 80-90 lbf in (9-10 Nm). The Viton seal kit for this cartridge is identified by part number 990608006.