SUN HYDRAULICS
RSFSKCV

***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 RSFSKCV (RSFSKCV) is a pilot-operated, balanced poppet sequence valve designed to supply a secondary circuit with flow once the pressure at inlet port 1 surpasses the valve setting. This valve effectively manages pressure at port 1 relative to the drain port 3, and it remains unaffected by back pressure at port 2 up to the valve setting. It can substitute for 2-port relief valves in situations where there is pressure in the return line. All three-port sequence cartridges of this type are interchangeable, sharing identical flow paths and cavities for a given frame size. As pressure at port 1 increases above the valve setting relative to port 3, pilot flow continues to rise. The main stage orifice is safeguarded by a 150-micron stainless steel screen. The pressure at port 3 directly adds to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar). This model is suitable for load holding applications and is designed to minimize issues related to cavitation, such as noise and manifold erosion, due to its internal modulation capabilities. It can handle maximum pressure at port 2 and is appropriate for cross-port relief circuits. The Sun floating style construction minimizes internal part binding due to excessive installation torque or cavity/cartridge machining variations. The RSFSKCV has a capacity of handling up to 30 gpm (120 L/min) with factory pressure settings established at 4 gpm (15 L/min). It operates efficiently under a maximum operating pressure of 5000 psi (350 bar), with typical response times around 10 ms. Maximum leakage at reseat is limited to 10 drops/min (0.7 cc/min). The adjustment involves up to five clockwise turns for increasing settings, with specific torque requirements for installation and locknut adjustments provided by Sun Hydraulics' guidelines.