SUN HYDRAULICS
RSJCYBV

***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 RSJCYBV (RSJCYBV) 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 controls pressure at port 1 relative to the drain port 3, remaining insensitive to back pressure at port 2 up to the valve setting. This makes it an ideal replacement for two-port relief valves where there is return line pressure. The RSJCYBV features interchangeable three-port sequence cartridges that maintain consistent flow paths and cavities for a given frame size, allowing for seamless integration into existing systems. The valve includes a main stage orifice protected by a 150-micron stainless steel screen and can handle pressures at port 3 that are directly additive to the valve setting at a 1:1 ratio, with a maximum of 5000 psi (350 bar). However, it is not suitable for load-holding applications due to spool leakage. The RSJCYBV offers adjustable settings using W or Y controls, with or without special settings that define maximum adjustments. It incorporates Sun's floating style construction to minimize internal part binding from excessive installation torque or machining variations. The cavity is T-19A with Series 4 capacity, supporting up to 120 gpm (480 L/min). Factory pressure settings are established at 4 gpm (15 L/min), with a maximum operating pressure of 5000 psi (350 bar). 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 valve leakage at 110 SUS (24 cSt) is limited to 5 in\u00b3/min (80 cc/min) at 1000 psi (70 bar). The adjustment requires up to five clockwise turns, and installation torque ranges from 350-375 lbf\u00b7ft (474-508 Nm). The model weighs approximately 3.10 lb (1.40 kg) and uses Viton seals for durability and performance reliability in various applications.