SUN HYDRAULICS
RPICWWV

***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 RPICWWV (RPICWWV) is a pilot-operated, balanced-piston relief cartridge designed for precise pressure regulation in hydraulic systems. This valve remains normally closed until the inlet port pressure reaches the preset level, at which point it opens to the tank port to regulate flow and maintain consistent pressure. Known for its accuracy and low-pressure rise relative to flow, the RPICWWV ensures smooth and quiet operation with moderate response speed. It can handle maximum pressure at port 2, making it suitable for cross-port relief circuits, though spool leakage should be considered in such applications. The valve's main stage orifice is protected by a 150-micron stainless steel screen, ensuring durability and reliability. However, it is not recommended for load-holding applications due to potential spool leakage. Back pressure on the tank port directly affects the valve setting in a 1:1 ratio. The RPICWWV is interchangeable with other two-port relief cartridges of the same frame size, sharing identical flow paths and cavities. This model supports systems using phosphate ester fluids when configured with EPDM seals but should not be exposed to petroleum-based substances as they may damage the seals. The valve features adjustable W and Y controls, allowing full-range adjustment unless a specific maximum setting is specified. For use in corrosive environments, corrosion-resistant versions are available with external stainless steel or zinc-nickel plated components. The RPICWWV incorporates Sun's floating style construction to minimize internal binding risks due to installation torque or machining variations. It has a capacity of 100 gpm (380 L/min) and operates at pressures up to 5000 psi (350 bar). The factory pressure settings are established at 4 gpm (15 L/min), with typical response times around 10 ms. Installation requires specific torque values for optimal performance and reliability.