SUN HYDRAULICS
RSFCWAN

***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 RSFCWAN (RSFCWAN) is a pilot-operated, balanced piston sequence valve designed to manage flow in hydraulic systems by supplying a secondary circuit once the inlet port pressure exceeds the set threshold. These valves are particularly useful for regulating pressure in situations where there is pressure in the return line, making them a suitable alternative to two-port relief valves. They feature interchangeable three-port sequence cartridges with consistent flow paths and cavity dimensions for a given frame size, ensuring ease of integration and replacement. The RSFCWAN's main stage orifice is shielded by a 150-micron stainless steel screen, enhancing durability and performance. The valve setting at port 1 is directly influenced by the pressure at drain port 3 on a 1:1 ratio, with a maximum allowable pressure of 5000 psi (350 bar). However, these valves are not recommended for load-holding applications due to potential spool leakage. The RSFCWAN offers adjustable controls with options for special settings that define maximum valve settings. Cartridges equipped with EPDM seals should be used exclusively in systems utilizing phosphate ester fluids, as exposure to petroleum-based substances can damage the seals. Incorporating Sun's floating-style construction, the RSFCWAN minimizes risks of internal part binding due to excessive installation torque or machining variations. It has a capacity of 30 gpm (120 L/min) and operates effectively at pressures up to 5000 psi (350 bar). The valve's response time is typically around 10 ms, with maximum leakage rates of approximately 3 in\u00b3/min at 1000 psi (50 cc/min at 70 bar). Installation requires specific torque specifications and hex sizes for adjustment screws and locknuts. The model weighs approximately .50 lb (.25 kg) and comes with an available Viton seal kit (990202006) for maintenance needs.