SUN HYDRAULICS
RBACKAV

***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 RBACKAV (Material Number: RBACKAV) is a direct-acting, pilot relief cartridge designed to remotely control the pressure setting of other pilot-operated valves. This component is specifically engineered for applications where capacity is limited to pilot flow, necessitating its use alongside higher flow valves. The RBACKAV model is particularly suitable for load-holding applications and features a main stage orifice protected by a 150-micron stainless steel screen. It incorporates Sun's floating style construction, which minimizes the risk of internal parts binding due to excessive installation torque or variations in cavity-cartridge machining. This valve can handle a maximum operating pressure of 5000 psi (350 bar) and has a typical response time of 2 milliseconds. The maximum valve leakage at 110 SUS (24 cSt) is specified at 5 drops/minute (0.3 cc/min). For adjustments, the valve requires five clockwise turns to increase the setting, with an internal hex size of 5/32 inches (4 mm) for the adjustment screw and a locknut hex size of 9/16 inches (15 mm). The installation torque ranges from 30 to 35 lbf-ft (41 to 47 Nm), and the locknut torque ranges from 80 to 90 lbf-in (9 to 10 Nm). Cartridges configured with EPDM seals are designed for systems using phosphate ester fluids; exposure to petroleum-based fluids will damage these seals. The back pressure on tank port port 2 directly adds to the valve setting at a ratio of 1:1. Additionally, corrosion-resistant options are available, identified by model code suffixes AP or LH for external stainless steel or zinc-nickel plated components, respectively. This product weighs approximately .30 lb (.15 kg) and comes with Viton seal kits under part number: 990010006.