SUN HYDRAULICS
RSFSCNV

***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 RSFSCNV (RSFSCNV) is a pilot-operated, balanced poppet sequence valve designed to deliver flow to a secondary circuit once the inlet port pressure exceeds the valve setting. This valve precisely 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 setting. It can replace 2-port relief valves for regulating pressure when there's return line pressure. All three-port sequence cartridges are interchangeable with identical flow paths and cavity sizes for each frame size. As inlet pressure at port 1 increases above the valve setting, pilot flow continues to rise. The main stage orifice is shielded by a robust 150-micron stainless steel screen, and port 3's pressure directly adds to the valve setting in a 1:1 ratio, not exceeding 5000 psi (350 bar). This makes it suitable for load-holding applications. The internal modulation ensures immunity from cavitation issues like noise and manifold erosion. It can handle maximum pressure at port 2, making it apt for cross-port relief circuits. The Sun floating style construction minimizes internal part binding due to excessive installation torque or machining variations. With a capacity of 30 gpm (120 L/min) and factory settings established at 4 gpm (15 L/min), it operates under a maximum pressure of 5000 psi (350 bar) with a typical response time of 10 ms. Maximum leakage upon reseat is minimal at ten drops per minute (0.7 cc/min). The valve allows for adjustment via five turns clockwise to increase settings, with specific hex sizes and torque requirements provided for installation and adjustment components. The model weighs .50 lb (.25 kg), and Viton seal kits are available under cartridge number 990402006.