SUN HYDRAULICS
RBACTWN

***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 RBACTWN (RBACTWN) is a direct-acting, pilot relief cartridge valve designed for remote pressure control in hydraulic systems. This valve is specifically used to manage the pressure settings of other pilot-operated valves and is suitable for load holding applications. It features EPDM seals, making it compatible with phosphate ester fluids while being incompatible with petroleum-based fluids, greases, and lubricants. The main stage orifice of the valve is protected by a 150-micron stainless steel screen to ensure durability and performance in various conditions. The RBACTWN model has a maximum operating pressure of 5000 psi (350 bar) and offers a capacity of 0.25 gpm (1 L/min). Notably, back pressure on the tank port is directly additive to the valve setting at a 1:1 ratio. The cartridge incorporates Sun's floating style construction to minimize internal binding due to excessive installation torque or machining variations. It also provides corrosion-resistant options identified by suffixes AP or LH for external stainless steel or zinc-nickel plated components respectively. This model allows adjustment throughout its full range using W or Y controls unless specified otherwise with a special setting that indicates the maximum valve setting. The RBACTWN has an adjustment screw internal hex size of 5/32 inches (4 mm) and requires an installation torque between 30 to 35 lbf-ft (41 to 47 Nm). With its robust design, quick response time of approximately 2 ms, and low leakage rate at 110 SUS (24 cSt), this cartridge valve is ideal for preventing overpressure in hydraulic systems where precision and reliability are crucial.