SUN HYDRAULICS
RSFSKCN

***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 RSFSKCN (RSFSKCN) is a pilot-operated, balanced poppet sequence valve designed to supply a secondary circuit with flow once the inlet port 1 pressure surpasses the pre-set valve threshold. This valve precisely manages the pressure at port 1 relative to the drain port 3, demonstrating insensitivity to back pressure at port 2 up to the established setting. It serves as an alternative to 2-port relief valves, particularly when there's return line pressure. Notably, all three-port sequence cartridges are interchangeable in terms of flow path and cavity for a given frame size. The design ensures that pilot flow increases as the inlet pressure at port 1 exceeds the pressure at port 3 beyond the valve setting. The main stage orifice is safeguarded by a robust 150-micron stainless steel screen. The pressure at port 3 adds directly to the valve setting in a 1:1 ratio, with an upper limit of 5000 psi (350 bar). This makes it suitable for load-holding applications. The internal modulation within the cartridge renders these valves immune to issues like cavitation-associated noise and manifold erosion. The RSFSKCN model accepts maximum pressure at port 2 and is ideal for cross-port relief circuits. It incorporates Sun's floating style construction, minimizing risks of internal parts binding due to excessive installation torque or machining variations in cavity/cartridge setups. With a capacity of handling up to 30 gpm (120 L/min), it operates efficiently under maximum pressures of up to 5000 psi (350 bar) with typical response times around 10 ms. Its robust build includes features like adjustment screws and locknut hex sizes designed for precise installation and operation, ensuring reliable performance in demanding hydraulic applications.