SUN HYDRAULICS
RSHCYAN

***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 RSHCYAN (RSHCYAN) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the inlet port pressure exceeds the valve setting. It precisely controls the pressure at port 1 relative to the drain port 3, remaining unaffected by back pressure at port 2 up to the valve setting. This valve can substitute for two-port relief valves when there is return line pressure. All three-port sequence cartridges are interchangeable, maintaining consistent flow paths and cavity sizes for given frames. The pilot flow increases as inlet pressure rises above the valve setting relative to drain pressure, with a main stage orifice shielded by a 150-micron stainless steel screen. The additive pressure at port 3 should not surpass 5000 psi (350 bar). Notably, it is unsuitable for load-holding applications due to spool leakage. The RSHCYAN model features an adjustable control range through W or Y controls unless specified otherwise. It incorporates Sun's floating style construction to minimize internal part binding from excessive torque or machining variations. With a T-17A cavity and Series 3 capacity of 60 gpm (240 L/min), it operates at a maximum of 5000 psi (350 bar), with factory settings established at 4 gpm (15 L/min). Control pilot flow ranges from 15-20 in\u00b3/min (0.25-0.33 L/min), and typical response time is around 10 ms. Maximum leakage stands at four in\u00b3/min at 110 SUS (24 cSt) and 1000 psi (65 cc/min, 70 bar). Adjustment involves up to five clockwise turns, with specific torque requirements for installation and locknut adjustments. The model weighs approximately 1.50 lb (0.70 kg) and uses Viton seal kits like cartridge number 990017006 for maintenance or replacements.