SUN HYDRAULICS
RSDSKBN

***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 RSDSKBN (RSDSKBN) is a pilot-operated, balanced poppet sequence valve designed to supply a secondary circuit with flow once the inlet port pressure exceeds the valve setting. This valve is engineered to regulate pressure at port 1 relative to the drain port 3, remaining insensitive to back pressure at port 2 up to the valve setting. It can replace two-port relief valves when there is return line pressure and is suitable for load holding applications. The RSDSKBN features interchangeable three-port sequence cartridges, ensuring identical flow paths and cavity compatibility for given frame sizes. As inlet pressure at port 1 increases relative to drain pressure at port 3 beyond the valve setting, pilot flow continues to rise. The main stage orifice is safeguarded by a 150-micron stainless steel screen, and pressure at port 3 adds directly to the valve setting in a 1:1 ratio, with a limit of 5000 psi (350 bar). This model incorporates Sun's floating style construction, minimizing internal part binding due to installation torque or machining variations. It accepts maximum pressure at port 2, making it suitable for cross-port relief circuits and immune to cavitation issues like noise and manifold erosion. With a capacity of 15 gpm (60 L/min) and maximum operating pressure of 5000 psi (350 bar), the RSDSKBN offers quick response times of approximately 10 ms and minimal leakage upon reseat. Installation specifications include a hex size of .78 in (22.2 mm) and installation torque between 30-35 lbf ft (41-47 Nm). The model weighs .30 lb (.15 kg) and utilizes Viton seal kits for optimal performance under various conditions.