SUN HYDRAULICS
RSFCONN

***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 RSFCONN (RSFCONN) is a pilot-operated, balanced piston sequence valve designed to manage secondary circuit flow once the inlet port 1 pressure surpasses the valve setting. This valve precisely controls the pressure at port 1 relative to port 3, remaining unaffected by back pressure at port 2 up to the valve setting. It can function as a substitute for two-port relief valves when there is return line pressure. Notably, all three-port sequence cartridges are interchangeable in terms of flow path and cavity size for a given frame size. The pilot flow increases as the inlet pressure at port 1 rises above the valve setting relative to drain pressure at port 3. A stainless steel screen with a 150-micron rating protects the main stage orifice. Port 3's pressure adds directly to the valve setting at a 1:1 ratio, with a maximum limit of 5000 psi (350 bar). This product is unsuitable for load-holding applications due to spool leakage. The RSFCONN features adjustable W and Y controls, allowing full-range adjustments unless specified otherwise for special settings, which indicate maximum settings. Cartridges with EPDM seals are intended for phosphate ester fluid systems and are incompatible with petroleum-based substances. Sun's floating style construction reduces internal part binding risks from excessive installation torque or machining variations. Key specifications include a T-2A cavity series, a capacity of 30 gpm (120 L/min), and factory-set pressures established at 4 gpm (15 L/min). The maximum operating pressure is set at 5000 psi (350 bar), with control pilot flow ranging from 10 to 15 in\u00b3/min (0.16 - 0.25 L/min) and typical response time of about 10 ms. Maximum valve leakage is rated at 3 in\u00b3/min under specific conditions. Installation requires specific torque settings and hex sizes for adjustments and locknuts, ensuring secure operation within defined parameters.