SUN HYDRAULICS
RVISLNN

***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 RVISLNN (RVISLNN) is a ventable, pilot-operated, balanced poppet relief cartridge designed as a normally closed pressure regulating valve. It functions by opening to tank port 2 when the pressure at inlet port 1 reaches the pre-set level, thereby throttling flow to maintain regulated pressure. This model includes a vent port 3 that allows for remote control using other pilot or 2-way valves. Known for its accuracy and low-pressure rise versus flow, it operates smoothly and quietly with moderate speed. The internal modulating feature makes it resistant to cavitation-related issues like noise and manifold erosion. This valve is ideal for load holding applications, provided that any valve on vent port 3 is zero leak. It can handle maximum pressure at port 2 and is suitable for cross-port relief circuits. The valve's setting can be controlled below its own level with a remote pilot relief on vent port 3. It demonstrates relative insensitivity to varying oil temperatures and contamination in the oil. The main stage orifice is protected by a 150-micron stainless steel screen. Key specifications include a cavity type T-19A, series 4 capacity of up to 120 gpm (480 L/min), and a maximum operating pressure of 5000 psi (350 bar). It has a control pilot flow rate of 15-20 in\u00b3/min (0.25-0.33 L/min) with typical response times around 2 milliseconds. The maximum valve leakage at reseat is limited to 10 drops/minute (0.7 cc/min). Installation requires specific torque settings: valve installation torque of 350-375 lbf\u00b7ft (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\u00b7in (9-10 Nm). The model weight is approximately 3.10 lb (1.40 kg) with Viton seal kit options available under part number 990219006.