SUN HYDRAULICS
RSJCKBN

***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 RSJCKBN (RSJCKBN) 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 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. These valves can regulate pressure in place of two-port relief valves if there is pressure in the return line. All three-port sequence cartridges are interchangeable, with consistent flow paths and cavity sizes for a given frame size. The main stage orifice is protected by a 150-micron stainless steel screen, and pressure at port 3 adds directly to the valve setting at a 1:1 ratio, not exceeding 5000 psi (350 bar). The valve is not suitable for load holding applications due to spool leakage. The RSJCKBN incorporates Sun's floating style construction, minimizing internal parts binding due to excessive installation torque or machining variations. It features a cavity T-19A, Series 4 capacity of 120 gpm (480 L/min), and factory pressure settings established at 4 gpm (15 L/min). The maximum operating pressure is 5000 psi (350 bar), with control pilot flow between 15-20 in\u00b3/min (0.25-0.33 L/min) and typical response time of 10 ms. Maximum valve leakage at 110 SUS (24 cSt) is rated at 5 in\u00b3/min (80 cc/min) at 1000 psi (70 bar). The adjustment allows up to five clockwise turns to increase settings, with specific dimensions for installation torque and adjustment screws provided. The model weighs approximately 3.10 lb (1.40 kg) with an optional Viton seal kit available for enhanced performance and reliability in hydraulic systems requiring precise sequence control under varying pressures.