SUN HYDRAULICS
RSHCQWN

***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 RSHCQWN (RSHCQWN) is a pilot-operated, balanced piston sequence valve designed to manage the flow to a secondary circuit once the pressure at the inlet port 1 surpasses the valve setting. This sequence valve effectively controls pressure at port 1 relative to the drain port 3 and remains unaffected by back pressure at port 2, up to the valve setting. It can serve as a substitute for two-port relief valves when there is pressure in the return line. Featuring interchangeable three-port sequence cartridges with identical flow paths and cavities for given frame sizes, this valve ensures versatility across applications. The pilot flow escalates as inlet pressure at port 1 rises above the setting relative to drain port 3. 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, not exceeding 5000 psi (350 bar). It's important to note that this model is not suitable for load holding applications due to spool leakage. The RSHCQWN incorporates Sun's floating style construction, minimizing internal part binding due to excessive installation torque or machining variations. This model fits into cavity T-17A Series 3 with a capacity of up to 60 gpm (240 L/min), and it has factory pressure settings established at 4 gpm (15 L/min). It operates under maximum pressures of 5000 psi (350 bar) with control pilot flow ranging from 15-20 in\u00b3/min (0.25-0.33 L/min). Typical response time is around 10 ms, and it allows for adjustment through clockwise turns on its screw, with specific torque requirements detailed for installation and locknut adjustments. The unit weighs approximately 1.50 lb (0.70 kg), and a Viton seal kit is available for maintenance purposes.