SUN HYDRAULICS
RSFCWWV

***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 RSFCWWV (RSFCWWV) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the inlet port pressure exceeds the valve setting. This valve effectively regulates pressure at port 1 relative to the drain port 3 pressure and is insensitive to back pressure at port 2 up to the valve setting. It can replace two-port relief valves when there is return line pressure. The RSFCWWV model features interchangeable three-port sequence cartridges and includes a main stage orifice protected by a 150-micron stainless steel screen. It supports maximum operating pressures of up to 5000 psi (350 bar) and offers adjustable settings through W or Y controls, with special settings available upon specification. This sequence valve is not suitable for load holding applications due to spool leakage. It incorporates Sun's floating style construction, minimizing internal part binding from excessive torque or machining variations. The valve accommodates systems using phosphate ester fluids when configured with EPDM seals, but exposure to petroleum-based substances will damage these seals. The RSFCWWV has a capacity of 30 gpm (120 L/min) and factory pressure settings established at 4 gpm (15 L/min). Its control pilot flow ranges between 10-15 in\u00b3/min (0.16-0.25 L/min), with a typical response time of approximately 10 ms. Maximum leakage at 110 SUS (24 cSt) is limited to 3 in\u00b3/min at 1000 psi (50 cc/min at 70 bar). Installation specifications include a hex size of 1-1/8 inches (28.6 mm), installation torque of 45-50 lbf\u00b7ft (61-68 Nm), an internal hex size adjustment screw of 5/32 inches (4 mm), and locknut torque requirements of 80-90 lbf\u00b7in (9-10 Nm). The model weighs approximately .50 lb (.25 kg) and uses Viton seal kits for cartridge sealing needs.