SUN HYDRAULICS
RPICQCV

***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 RPICQCV (Material Number: RPICQCV) is a pilot-operated, balanced-piston relief cartridge designed to regulate pressure in hydraulic systems. This valve remains normally closed and begins to open when the inlet port pressure reaches the set threshold, directing flow to the tank port to maintain consistent pressure levels. Known for its accuracy and smooth operation, this relief valve offers low pressure rise relative to flow and is moderately fast in response. It can handle maximum pressures at port 2, making it suitable for use in cross-port relief circuits; however, users should be aware of potential spool leakage in such applications. Notably, it is not recommended for load-holding applications due to this leakage issue. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability and reliability in operation. The valve's back pressure on the tank port directly adds to the valve setting at a 1:1 ratio. Its design allows all two-port relief cartridges (excluding pilot reliefs) to be interchangeable physically and functionally within their frame size, maintaining identical flow paths and cavities. This model supports configurations with EPDM seals for compatibility with phosphate ester fluids while avoiding petroleum-based substances that could damage these seals. For environments prone to corrosion, options are available with either stainless steel components or zinc-nickel plating identified by suffixes AP or LH respectively. The Sun Hydraulics RPICQCV incorporates floating style construction that minimizes internal part binding due to installation torque variations or machining discrepancies. Key specifications include a maximum operating pressure of 5000 psi (350 bar), a capacity of 100 gpm (380 L/min), and a typical response time of 10 milliseconds. The valve features an adjustment range facilitated by an internal hex screw and locknut system for secure settings adjustments.