SUN HYDRAULICS
RSFCLNE

***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 RSFCLNE (RSFCLNE) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the pressure at inlet port 1 exceeds the valve setting. This model 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 be used as an alternative to two-port relief valves when there is pressure in the return line. The RSFCLNE features interchangeable three-port sequence cartridges with consistent flow paths and cavity sizes for a given frame size. As inlet pressure at port 1 rises above the setting, pilot flow increases, while a built-in stainless steel screen protects the main stage orifice. The valve's pressure setting is directly additive to port 3's pressure at a 1:1 ratio, with a maximum limit of 5000 psi (350 bar). It is not suitable for load-holding applications due to potential spool leakage. The RSFCLNE can be configured with W and Y controls, either adjustable throughout their range or set to a specified maximum. EPDM seals are available for systems using phosphate ester fluids; however, these seals are incompatible with petroleum-based substances. Incorporating Sun's floating style construction, this valve minimizes internal binding risks due to installation torque or machining variations. Its specifications include a cavity T-2A series design, capacity of 30 gpm (120 L/min), and factory-set pressures established at 4 gpm (15 L/min). The maximum operating pressure is rated at 5000 psi (350 bar), with control pilot flows between 10-15 in\u00b3/min (0.16-0.25 L/min) and typical response times around 10 ms. Valve leakage rates do not exceed 3 in\u00b3/min at 1000 psi (50 cc/min at 70 bar), adjustable via five clockwise turns for increased settings. Installation requires specific torque values and hex sizes for both adjustment screws and locknuts, ensuring secure and precise operation.