SUN HYDRAULICS
RVISLBN

***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 RVISLBN (Material Number: RVISLBN) is a ventable, pilot-operated, balanced-poppet relief cartridge designed to function as a normally closed pressure regulating valve. It activates when the pressure at inlet port 1 reaches the predetermined setting, opening to tank port 2 and throttling flow to maintain regulated pressure. This model includes a vent port 3 for remote control through other pilot or two-way valves, ensuring accurate performance with low pressure rise versus flow and smooth, quiet operation. The valve is suitable for load holding applications provided that any valving on the vent port is zero leak. It can withstand maximum pressure at port 2 and is appropriate for cross-port relief circuits. Additionally, a remote pilot relief on port 3 can control the valve below its own setting. Notably insensitive to variations in oil temperature and contamination, this cartridge features a main stage orifice protected by a 150-micron stainless steel screen. Back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The design incorporates Sun's floating style construction to prevent internal binding due to excessive torque or machining variations. With a capacity of up to 120 gpm (480 L/min) and maximum operating pressure of 5000 psi (350 bar), its response time is typically around 2 ms with minimal leakage at reseat levels. Installation requires specific torques: valve installation torque between 350-375 lbf ft (474-508 Nm), adjustment screw internal hex size of 5/32 in (4 mm), locknut hex size of 9/16 in (15 mm), and locknut torque between 80-90 lbf in (9-10 Nm). The model weighs approximately 3.10 lb (1.40 kg) and uses Viton seals available under seal kit number: 990219006.