SUN HYDRAULICS
RBACYAN

***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 RBACYAN (RBACYAN) is a direct-acting, pilot relief cartridge designed to remotely control the pressure setting of other pilot-operated valves. This valve is specifically configured for systems using phosphate ester fluids, as its EPDM seals are susceptible to damage from petroleum-based fluids. It features a main stage orifice protected by a 150-micron stainless steel screen and is suitable for load-holding applications. The valve's setting is influenced by back pressure on the tank port at a 1:1 ratio. Adjustable throughout its full range using W or Y controls, the RBACYAN can also be specified with a special setting, which represents the maximum setting of the valve. This corrosion-resistant cartridge is available with external stainless steel components or zinc-nickel plating, identified by model code suffixes AP or LH respectively. The floating style construction minimizes internal binding due to excessive installation torque or machining variations. With a capacity of 0.25 gpm (1 L/min) and a maximum operating pressure of 5000 psi (350 bar), it offers quick response times typically around 2 ms and minimal leakage at standard viscosity levels. The RBACYAN incorporates several practical design features such as an adjustment screw with an internal hex size of 5/32 inch (4 mm) and requires specific installation torques for optimal performance. Weighing just 0.30 lb (0.15 kg), it includes a Viton seal kit option for enhanced durability in various applications where rapid and reliable pressure control is essential, such as preventing overpressure scenarios in hydraulic systems.