SUN HYDRAULICS
RSHHBWN

***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 RSHHBWN (RSHHBWN) is a hydraulically controlled, pilot-operated, balanced piston relief cartridge designed to regulate pressure using an external pilot signal instead of an adjustable spring. This hydraulic signal is supplied through a port in the hex end of the cartridge and is amplified at a 12:1 ratio. The valve functions as a normally closed pressure-regulating device, opening to tank port 2 when the inlet port 1 pressure reaches the set threshold, thereby throttling flow to maintain desired pressure levels. These valves are optimal for amplifying signals from pilot controls like joysticks and are known for their accuracy, low pressure rise versus flow characteristics, smooth operation, quiet performance, and moderate response speed. They are built with Sun's floating style construction to reduce internal part binding risks due to excessive installation torque or machining variations. The main stage orifice is protected by a 150-micron stainless steel screen. Notably, these valves should not be used in typical crossport relief circuits. They are insensitive to back pressure at tank port 2 and require careful consideration of drain path clearance due to potential amplification of pressure fluctuations by a factor of 12 at port 3. The RSHHBWN model operates within a maximum operating pressure of 5000 psi (350 bar) and can handle pilot pressures up to 600 psi (40 bar). It has a capacity of handling flows up to 60 gpm (240 L/min) with typical response times around 10 ms. The valve's hex size is 1\u00bc inches (31.8 mm), with an installation torque requirement between 150-160 lbf ft (203-217 Nm). It weighs approximately 1.50 lb (0.70 kg) and uses Viton seals with seal kit number 990017006 available for maintenance needs.