SUN HYDRAULICS
RSHSCQN

***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 RSHSCQN (RSHSCQN) is a pilot-operated, balanced poppet sequence valve designed to supply a secondary circuit with flow once the pressure at inlet port 1 exceeds the valve setting. This sequence valve regulates pressure at port 1 relative to the drain port 3 and is insensitive to back pressure at port 2 up to the valve setting. It can replace 2-port relief valves when there is pressure in the return line. The RSHSCQN model features interchangeable 3-port sequence cartridges, ensuring compatibility in terms of flow path and cavity size for a given frame size. As pressure at port 1 increases relative to port 3, pilot flow continues to rise above the valve setting. The main stage orifice is safeguarded by a 150-micron stainless steel screen, and pressure at port 3 directly adds to the valve setting in a 1:1 ratio, with a maximum limit of 5000 psi (350 bar). This model is suitable for load-holding applications and uses internal modulation to prevent issues like cavitation 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 installation torque or machining variations. Key specifications include a T-17A cavity series with a capacity of up to 60 gpm (240 L/min), factory pressure settings established at 4 gpm (15 L/min), and maximum operating pressure of up to 5000 psi (350 bar). It has a typical response time of approximately 10 ms and maximum valve leakage upon reseat of about ten drops/minute (0.7 cc/min). The adjustment screw has an internal hex size of ^5\u204432 inches (4 mm), with locknut torque ranging from 80-90 lbf-in (9-10 Nm). This model weighs approximately 1.50 lb (0.70 kg) and includes a Viton seal kit option under cartridge number: 990217006.