SUN HYDRAULICS
RSFCFNV

***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 RSFCFNV (RSFCFNV) is a pilot-operated, balanced piston sequence valve designed to manage pressure in hydraulic systems. This valve efficiently supplies a secondary circuit with flow once the inlet port 1 pressure surpasses the set threshold. It maintains pressure control at port 1 relative to the drain port 3, remaining unaffected by back pressure at port 2 up to the valve setting. The RSFCFNV can substitute for 2-port relief valves when return line pressure exists. All three-port sequence cartridges are interchangeable within their frame size, ensuring consistent flow paths and cavity compatibility. The valve's pilot flow increases as inlet pressure rises above the setting, with a stainless steel screen protecting the main stage orifice. Pressure at port 3 adds directly to the valve setting in a 1:1 ratio, not exceeding 5000 psi (350 bar). However, it is unsuitable for load-holding applications due to spool leakage. The RSFCFNV features adjustable W and Y controls, which can be specified with or without special settings, allowing full-range adjustability or maximum setting specification. Cartridges with EPDM seals are suitable for phosphate ester fluid systems but incompatible with petroleum-based substances. The Sun floating style construction minimizes internal binding risks from excessive torque or machining variations. Technical specifications include a T-2A cavity series, a capacity of 30 gpm (120 L/min), and a maximum operating pressure of 5000 psi (350 bar). Control pilot flow ranges from 10-15 in\u00b3/min (0.16-0.25 L/min), with typical response times of approximately 10 ms and maximum leakage rates of 3 in\u00b3/min (50 cc/min) at specified conditions. The valve requires specific installation torques and seal kits for optimal performance and longevity in hydraulic applications.