SUN HYDRAULICS
RELIEF CART
RVBALWN

***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 RVBALWN (Material Number: RVBALWN) is a ventable, pilot-operated, balanced piston relief cartridge designed for pressure regulation in hydraulic systems. This valve remains normally closed and activates when the inlet port pressure reaches a predetermined setting, opening to the tank port to throttle flow and regulate pressure. It features a vent port that enables remote control through other pilot or 2-way valves. Notably accurate with low pressure rise versus flow, this valve operates smoothly and quietly with moderate speed. The RVBALWN can accept maximum pressure at port 2, making it suitable for cross-port relief circuits; however, spool leakage should be considered in such applications. The minimum setting is 75 psi (5 bar) across all spring ranges, but it is not recommended for load-holding applications due to potential spool leakage. This model incorporates Sun's floating style construction to minimize internal part binding from excessive torque or machining variations. It has a capacity of 7.5 gpm (30 L/min) and can handle up to 5000 psi (350 bar) of operating pressure. The control pilot flow ranges between 7 - 10 in\u00b3/min (0.11 - 0.16 L/min), with a response time of approximately 10 milliseconds. The valve's hex size measures 3/4 inch (19.1 mm), and installation torque ranges from 20 - 25 lbf ft (27 - 33 Nm). Additionally, the adjustment screw requires a hex size of 5/32 inch (4 mm), while the locknut requires a hex size of 9/16 inch (15 mm) with torque specifications between 80 - 90 lbf in (9 - 10 Nm). The model weighs approximately .30 lb (.15 kg) and includes a Viton seal kit under part number: 990163006.