SUN HYDRAULICS
RSJSCQN

***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 RSJSCQN (RSJSCQN) is a pilot-operated, balanced poppet sequence valve designed to supply a secondary circuit with flow once the inlet port 1 pressure exceeds the valve setting. This sequence valve manages pressure at port 1 relative to the drain port 3 and remains unaffected by back pressure at port 2, up to the valve's setting. It can regulate pressure in place of 2-port relief valves when there is return line pressure. These cartridges are interchangeable across all three-port sequence cartridges, sharing the same flow path and cavity for a given frame size. As inlet pressure at port 1 rises above the set point relative to drain port 3, pilot flow increases. The main stage orifice is protected by a 150-micron stainless steel screen, and pressures at port 3 add directly to the valve setting in a 1:1 ratio, not exceeding 5000 psi (350 bar). The internal modulating process makes these valves resistant to cavitation issues such as noise and manifold erosion. They are suitable for cross port relief circuits and incorporate Sun's floating style construction to prevent internal binding from excessive torque or machining variations. This model fits into Cavity T-19A Series 4 with a capacity of up to 120 gpm (480 L/min) and can handle maximum operating pressures of up to 5000 psi (350 bar). It features control pilot flow rates between 15-20 in\u00b3/min (0.25-0.33 L/min) with a typical response time of about 2 ms. The maximum valve leakage upon reseat is limited to ten drops per minute (0.7 cc/min). Adjustment requires approximately five turns clockwise for increased settings, with specified installation torques and hex sizes for both the valve and locknut adjustments. The model weighs approximately 3.10 lbs (1.40 kg) and uses Viton seal kits under part number 990219006 for maintenance purposes.