SUN HYDRAULICS
RVBAKQV

***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 RVBAKQV (RVBAKQV) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. This normally closed pressure regulating valve opens to tank port 2 once the pressure at inlet port 1 reaches the preset level, effectively throttling flow to maintain stable pressure. It features a vent port 3 that allows for remote control via other pilot or two-way valves. Known for its accuracy and low-pressure rise versus flow, this valve operates smoothly and quietly with moderate speed. A remote pilot relief on port 3 enables control of the valve below its own setting, making it versatile for various applications. The RVBAKQV can handle maximum pressure at port 2 and is suitable for cross-port relief circuits, though spool leakage must be considered in such setups. It has a minimum setting of 75 psi (5 bar) across all spring ranges but is not ideal for load-holding applications due to potential spool leakage. The back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The main stage orifice is contamination-protected, and its Sun floating style construction minimizes internal part binding risks due to excessive installation torque or cavity/cartridge machining variations. Key specifications include a cavity size of T-163A, a series capacity of 7.5 gpm (30 L/min), and a maximum operating pressure of 5000 psi (350 bar). The factory pressure settings are established at 4 gpm (15 L/min), with control pilot flow ranging from 7-10 in\u00b3/min (0.11-0.16 L/min). Typical response time is around 10 ms, with maximum valve leakage at about 2 in\u00b3/min at 1000 psi (30 cc/min at 70 bar). The valve's installation torque ranges from 20-25 lbf\u00b7ft (27-33 Nm), with an adjustment screw internal hex size of ^5/32 in. (4 mm) and locknut torque between 80-90 lbf\u00b7in (9-10 Nm).