SUN HYDRAULICS
RSDSLCN

***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 RSDSLCN (RSDSLCN) is a pilot-operated, balanced poppet sequence valve designed to supply a secondary circuit with flow once the pressure at the inlet port 1 surpasses the valve setting. This sequence valve effectively controls the pressure at port 1 relative to the pressure at drain port 3, remaining unaffected by back pressure at port 2 up to the valve's set point. It can serve as a replacement for 2-port relief valves when there is return line pressure and is particularly suitable for load-holding applications. The RSDSLCN model ensures that pilot flow increases as inlet pressure at port 1 rises above the set point, relative to drain port 3. To protect its main stage orifice, it features a robust 150-micron stainless steel screen. The valve allows pressures at port 3 to add directly to the valve setting in a 1:1 ratio, withstanding up to a maximum of 5000 psi (350 bar). Its design supports maximum pressure acceptance at port 2 and is apt for cross-port relief circuits. The Sun floating style construction minimizes internal binding due to excessive installation torque or machining variations. With a capacity of 15 gpm (60 L/min) and factory settings established at 4 gpm (15 L/min), this model operates efficiently under a maximum operating pressure of up to 5000 psi (350 bar). It demonstrates rapid response times typically around 10 ms and maintains minimal leakage upon reseating, with specifications indicating only about ten drops per minute (0.7 cc/min). The RSDSLCN model weighs approximately .30 lb (.15 kg) and includes an adjustment feature allowing five clockwise turns for increased settings. Installation requires specific torques: valve hex size is .78 in. (22.2 mm), with an installation torque range of 30-35 lbf-ft (41-47 Nm), while locknut hex size measures .916 in. (15 mm) with torque requirements between 80-90 lbf-in (9-10 Nm).