SUN HYDRAULICS
RSHCQEN

***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 RSHCQEN (RSHCQEN) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the inlet port 1 pressure exceeds the valve setting. This valve effectively controls the 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 be used as a pressure regulator in place of 2-port relief valves when there is pressure in the return line. All three-port sequence cartridges are interchangeable, providing consistent flow paths and cavity compatibility for a given frame size. The pilot flow increases as the pressure at port 1 rises above the valve setting relative to port 3, with a main stage orifice protected by a 150-micron stainless steel screen. The maximum allowable pressure at port 3 should not exceed 5000 psi (350 bar), and this pressure directly adds to the valve setting at a 1:1 ratio. This model is not suitable for load-holding applications due to spool leakage. The RSHCQEN features Sun's floating style construction, minimizing internal binding risks due to installation torque or machining variations. It has a capacity of up to 60 gpm (240 L/min) and operates under pressures up to 5000 psi (350 bar). The control pilot flow ranges from 15-20 in\u00b3/min (0.25-0.33 L/min), with typical response times around 10 ms. Maximum leakage is specified at four in\u00b3/min at an oil viscosity of 110 SUS (24 cSt) under pressures of up to 1000 psi (70 bar). Adjustment capabilities include five clockwise turns for increasing settings, with specific dimensions provided for installation torque and adjustment components. The model weighs approximately 1.50 lb (0.70 kg) and uses Viton seals, available under seal kit number: 990017006.