SUN HYDRAULICS
RSBCKCN

***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 RSBCKCN (RSBCKCN) 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. This valve can regulate pressure in place of two-port relief valves when there is return line pressure. All three-port sequence cartridges are interchangeable, offering the same flow path and cavity for a given frame size. The valve features a main stage orifice protected by a 150-micron stainless steel screen and has a minimum setting of 75 psi (5 bar) for all spring ranges. Port 3's pressure adds directly to the valve setting at a 1:1 ratio, not exceeding 5000 psi (350 bar). It is not recommended for load-holding applications due to spool leakage. Cartridges with EPDM seals are suitable for phosphate ester fluid systems but can be damaged by petroleum-based fluids. The floating style construction minimizes internal part binding caused by excessive installation torque or machining variations. Specifications include Cavity T-16-3A, Series 0, capacity of 7.5 gpm (30 L/min), factory pressure settings at 4 gpm (15 L/min), maximum operating pressure of 5000 psi (350 bar), typical response time of 10 ms, and maximum leakage at specific conditions of 2 in\u00b3/min (30 cc/min). The adjustment requires five clockwise turns to increase setting, with specified torque values for installation and adjustments. The model weighs .30 lb (.15 kg) and includes a Viton seal kit option with part number 990163006.