SUN HYDRAULICS
RSHSCBN

***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 RSHSCBN (RSHSCBN) is a pilot-operated, balanced poppet 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 the pressure at drain port 3 and remains insensitive to back pressure at port 2, up to its set threshold. It can regulate pressure in lieu of two-port relief valves when there is pressure in the return line. All three-port sequence cartridges are interchangeable, offering identical flow paths and cavity sizes for a given frame size. The pilot flow increases as the inlet pressure at port 1, relative to drain port 3, rises above the valve setting. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability and reliability. The RSHSCBN model supports pressures up to 5000 psi (350 bar) and is particularly suitable for load-holding applications due to its internal modulation that mitigates cavitation issues such as noise and manifold erosion. It accepts maximum pressure at port 2, making it apt for cross-port relief circuits. Its floating style construction minimizes potential binding of internal parts caused by excessive installation torque or variations in cavity/cartridge machining. With specifications including a capacity of 60 gpm (240 L/min), response time typically around 10 ms, and maximum operating leakage of 10 drops/min (0.7 cc/min) upon reseat, this model ensures efficient performance in demanding conditions. The valve features an adjustable setting with five clockwise turns for increased settings and incorporates robust construction with a hex size of 1-1/4 inches (31.8 mm) and an installation torque range of 150-160 lbf ft (203-217 Nm). It also includes an internal hex adjustment screw size of 5/32 inches (4 mm) and locknut hex size of 9/16 inches (15 mm), with locknut torque between 80-90 lbf in (9-10 Nm). The unit weighs approximately 1.50 lb (0.70 kg) and comes with a Viton seal kit option for enhanced sealing capabilities under various operational conditions.