SUN HYDRAULICS
RSFSLWN

***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 RSFSLWN (RSFSLWN) 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 sequence valve controls the pressure at port 1 relative to the drain port 3, remaining unaffected by back pressure at port 2 up to the valve setting. It offers an alternative to 2-port relief valves in scenarios where there is pressure in the return line. Notably, all 3-port sequence cartridges are interchangeable in terms of flow path and cavity for a given frame size. The pilot flow increases as the inlet pressure at port 1 rises above the valve setting relative to port 3. Featuring a main stage orifice protected by a 150-micron stainless steel screen, this valve ensures durability and reliability. The RSFSLWN is suitable for load-holding applications and can handle maximum pressure at port 2, making it ideal for cross-port relief circuits. Its design incorporates Sun's floating style construction, which minimizes internal binding due to excessive installation torque or machining variations. The maximum operating pressure is rated at 5000 psi (350 bar), with a response time of approximately 10 ms and minimal leakage upon reseat. The valve allows up to five clockwise turns for adjustment, with specific torque requirements for installation and locknut adjustments. Weighing just .50 lb (.25 kg), it features Viton seal kits for enhanced performance. This versatile component is an excellent choice for hydraulic systems requiring reliable sequencing under varying pressures and conditions.