SUN HYDRAULICS
RSJCYBN

***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 RSJCYBN (RSJCYBN) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the pressure at the inlet port 1 exceeds the valve setting. This valve effectively controls the pressure at port 1 relative to port 3 and is insensitive to back pressure at port 2 up to the valve setting. It can replace 2-port relief valves in systems where there is pressure in the return line. All three-port sequence cartridges from Sun Hydraulics are interchangeable, maintaining consistent flow paths and cavity dimensions for given frame sizes. The main stage orifice includes a 150-micron stainless steel screen for protection. The valve's pressure setting can be directly influenced by the pressure at port 3, with a maximum allowable of 5000 psi (350 bar). However, it is not suitable for load-holding applications due to spool leakage. The RSJCYBN model incorporates Sun's floating style construction to minimize internal binding issues due to excessive torque or machining variations. It features a cavity size T-19A, series 4, with a capacity of up to 120 gpm (480 L/min). The factory pressure settings are established at a flow rate of 4 gpm (15 L/min), and it operates under maximum pressures of up to 5000 psi (350 bar). Control pilot flow ranges from 15\u201320 in\u00b3/min (0.25\u20130.33 L/min), with typical response times around 10 ms. Maximum leakage is rated at five in\u00b3/min at 110 SUS (24 cSt) under pressures of up to 1000 psi (70 bar). Adjustments require clockwise turns on an internal hex screw, and installation necessitates specific torque values for both the valve and locknut components. The model weighs approximately 3.10 lb (1.40 kg) and uses Viton seals with part number 990019006 for maintenance purposes.