SUN HYDRAULICS
RSFCFEV

***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 RSFCFEV (Material Number: RSFCFEV) is a pilot-operated, balanced piston sequence valve designed to manage hydraulic flow in secondary circuits. This valve activates when the pressure at inlet port 1 surpasses the preset valve setting, effectively controlling the pressure at port 1 relative to the drain port 3. It is engineered to be insensitive to back pressure at port 2 up to the valve's setting, making it suitable for regulating pressure in scenarios where there is return line pressure, replacing traditional two-port relief valves. Notably, all three-port sequence cartridges from Sun Hydraulics are interchangeable, offering consistent flow paths and cavity compatibility within a given frame size. The RSFCFEV features a main stage orifice protected by a 150-micron stainless steel screen and allows pilot flow to increase as inlet pressure rises above the set threshold. However, it is not recommended for load holding applications due to spool leakage. The valve's pressure at port 3 can add directly to the valve setting at a 1:1 ratio but should not exceed 5000 psi (350 bar). Adjustment options include W and Y controls with or without special settings; without any special specification, the valve remains adjustable throughout its range. For systems utilizing phosphate ester fluids, EPDM seals are incorporated but should avoid exposure to petroleum-based substances. The design includes Sun's floating style construction, reducing potential binding from excessive torque or machining variations. Key specifications include a capacity of 30 gpm (120 L/min), factory settings established at 4 gpm (15 L/min), maximum operating pressure of 5000 psi (350 bar), and typical response time of 10 ms. The cartridge weighs approximately .50 lb (.25 kg) and requires specific installation torque settings for optimal performance.