SUN HYDRAULICS
RSFCOPN

***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 RSFCOPN (RSFCOPN) 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. It controls the pressure at port 1 relative to the pressure at the drain port 3, remaining insensitive to back pressure at port 2 up to the valve setting. This feature makes it suitable for use in regulating pressure in place of two-port relief valves when there is pressure in the return line. The RSFCOPN model is physically and functionally interchangeable with all three-port sequence cartridges of the same frame size, offering a consistent flow path and cavity configuration. This valve includes a protected main stage orifice with a 150-micron stainless steel screen, ensuring durability and reliability. The maximum operating pressure is 5000 psi (350 bar), with pilot flow control ranging from 10 to 15 in\u00b3/min (0.16 to 0.25 L/min). However, it is not suitable for load-holding applications due to spool leakage. Adjustability is provided through W and Y controls, which can be specified with or without special settings. The cartridge incorporates Sun\u2019s floating style construction, minimizing internal part binding due to excessive installation torque or machining variations. It features EPDM seals for systems using phosphate ester fluids; however, exposure to petroleum-based fluids will damage these seals. The RSFCOPN model has a capacity of 30 gpm (120 L/min) and factory-established pressure settings at 4 gpm (15 L/min). Installation specifics include a valve hex size of 1-1/8 inches (28.6 mm) and an installation torque range of 45-50 lbf-ft (61-68 Nm). With its robust design and precise control capabilities, this sequence valve is ideal for various hydraulic applications requiring precise flow management under specific conditions.