SUN HYDRAULICS
RBAALWV

***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 RBAALWV (RBAALWV) is a direct-acting, pilot relief cartridge designed for remote pressure control in hydraulic systems. This valve is intended to work alongside higher flow valves due to its limited capacity to pilot flow. 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 affected directly by back pressure on the tank port at a 1:1 ratio. Configured with EPDM seals, this cartridge is compatible with systems using phosphate ester fluids but should not be exposed to petroleum-based fluids, which could damage the seals. The RBAALWV model includes options for corrosion resistance, identified by suffixes AP or LH in the model code, indicating external stainless steel components or zinc-nickel plating, respectively. The valve incorporates Sun's floating style construction to reduce internal binding risks from installation torque or machining variations. It fits into a T-3A cavity and supports Series 2 capacity with a maximum operating pressure of 5000 psi (350 bar). The typical response time is 2 milliseconds, and maximum leakage at 110 SUS (24 cSt) is limited to 5 drops per minute (0.3 cc/min). Adjustment of the valve setting can be achieved through five clockwise turns, with specific torque and hex size requirements for installation and locking components. This product weighs approximately 0.50 lb (0.25 kg) and comes with a Viton seal kit option (part number: 990203006). Direct-acting valves like the RBAALWV are preferred for preventing overpressure due to their speed, dirt tolerance, stability, and robustness compared to pilot-operated valves.