SUN HYDRAULICS
RSFSCWV

***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 RSFSCWV (RSFSCWV) is a pilot-operated, balanced poppet sequence valve designed to supply a secondary circuit with flow once the inlet port 1 pressure surpasses the valve setting. This valve controls pressure at port 1 relative to the drain port 3 and remains unaffected by back pressure at port 2 up to the valve setting. It can regulate pressure in place of two-port relief valves if there is pressure in the return line. The RSFSCWV is part of a series where all three-port sequence cartridges are interchangeable, sharing flow paths and cavity sizes for a given frame. As the inlet port 1 pressure rises above the valve setting, pilot flow continues to increase. The main stage orifice is protected by a 150-micron stainless steel screen, ensuring durability and performance. This model is suitable for load-holding applications and immune to cavitation-related issues such as noise and manifold erosion due to its internal modulating mechanism. It accepts maximum pressure at port 2, making it ideal for cross-port relief circuits, and features Sun's floating style construction to prevent internal binding from excessive torque or machining variations. Key specifications include a capacity of 30 gpm (120 L/min), a maximum operating pressure of 5000 psi (350 bar), and a typical response time of 10 ms. The valve has minimal leakage at reseat, with only up to 10 drops/min (0.7 cc/min). Adjustments can be made with five clockwise turns, with specific torque requirements for installation and adjustments: Valve Hex Size is 1-1/8 inches (28.6 mm) with an installation torque of 45-50 lbf-ft (61-68 Nm), while adjustment screw internal hex size is 5/32 inches (4 mm) and locknut hex size is 9/16 inches (15 mm) with locknut torque between 80-90 lbf-in (9-10 Nm). The model weighs .50 lb (.25 kg) and uses Viton seal kits identified as cartridge number: 990402006.