SUN HYDRAULICS
RSFCCNV

***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 RSFCCNV (RSFCCNV) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the pressure at the inlet port 1 exceeds the valve setting. This valve is ideal for applications where pressure control is crucial, as it maintains the pressure at port 1 relative to the drain port 3, regardless of back pressure at port 2, up to the valve setting. The RSFCCNV can substitute for two-port relief valves in systems experiencing return line pressure. It features interchangeable three-port sequence cartridges, maintaining consistent flow paths and cavity sizes across frames. The main stage orifice benefits from a protective 150-micron stainless steel screen. Notably, pressure at port 3 adds directly to the valve setting in a 1:1 ratio, with a maximum allowable pressure of 5000 psi (350 bar). However, it is unsuitable for load-holding applications due to spool leakage. The RSFCCNV offers adjustable settings through W and Y controls, with or without special settings that define maximum adjustments. For systems using phosphate ester fluids, EPDM seals are incorporated; however, these seals are vulnerable to petroleum-based substances. The floating style construction reduces internal binding risks caused by excessive installation torque or machining variations. This model supports a flow capacity of up to 30 gpm (120 L/min) and has factory pressure settings established at 4 gpm (15 L/min). It operates under a maximum pressure of 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. Maximum leakage is limited to 3 in\u00b3/min at 110 SUS (24 cSt) under conditions of up to 1000 psi (70 bar). Installation requires specific torque settings and hex sizes for adjustment screws and locknuts.