SUN HYDRAULICS
RBACLWN

***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 RBACLWN (Material Number: RBACLWN) is a direct-acting, pilot relief cartridge designed to remotely control the pressure setting of other pilot-operated valves. This cartridge is specifically configured for systems with phosphate ester fluids, using EPDM seals to prevent damage from petroleum-based fluids. It features a main stage orifice protected by a 150-micron stainless steel screen, making it suitable for load-holding applications. The valve's setting is directly influenced by back pressure on the tank port at a 1:1 ratio. The RBACLWN model can be adjusted throughout its full range using W or Y controls unless specified otherwise. Corrosion resistance is enhanced with options for external stainless steel components or zinc-nickel plating, identified by the model code suffixes AP or LH, respectively. Incorporating Sun's floating style construction minimizes internal parts binding due to excessive installation torque or machining variations. The cartridge fits into a T-10A cavity and offers a capacity of 0.25 gpm (1 L/min), with a maximum operating pressure of 5000 psi (350 bar). The typical response time is 2 ms, and maximum valve leakage is limited to 5 drops/min (0.3 cc/min) at 110 SUS (24 cSt). For adjustment, the valve requires five clockwise turns to increase the setting and includes an internal hex size of 5/32 in (4 mm) for the adjustment screw. Installation torque ranges from 30 to 35 lbf-ft (41 to 47 Nm), while locknut torque ranges from 80 to 90 lbf-in (9 to 10 Nm). The model weighs approximately .30 lb (0.15 kg) and comes with a Viton seal kit option under part number 990010006.