SUN HYDRAULICS
RPCCFWV

***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 RPCCFWV (RPCCFWV) is a pilot-operated, balanced-piston relief cartridge designed as a normally closed pressure-regulating valve. This model starts to open at the tank port 2 when the pressure at the inlet port 1 reaches the set value, effectively throttling flow to maintain regulated pressure. Known for its accuracy and low-pressure rise versus flow, the RPCCFWV operates smoothly and quietly with moderate speed. The valve can accept maximum pressure at port 2, making it suitable for cross-port relief circuits, though users should consider spool leakage in such applications. The minimum setting for all spring ranges is 75 psi (5 bar), and it is not recommended for load-holding applications due to potential spool leakage. The cartridge's back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. It features a protected main stage orifice against contamination and uses Sun's floating-style construction to minimize internal part binding from excessive installation torque or machining variations. Cartridges with EPDM seals are compatible with phosphate ester fluids but not petroleum-based fluids or lubricants. This model fits into cavity T-162A, Series 0, with a capacity of 12 gpm (45 L/min) and operates at a maximum pressure of 5000 psi (350 bar). It has a typical response time of 10 ms and maximum valve leakage of 2 in/min (30 cc/min) at 110 SUS (24 cSt). The adjustment requires up to five clockwise turns, with installation torque ranging from 20-25 lbf ft (27-33 Nm). The adjustment screw has an internal hex size of 5/32 in. (4 mm), while the locknut hex size is 1/2 in. (12.7 mm), requiring locknut torque between 80-90 lbf in. (9-10 Nm). This model weighs approximately .20 lb (.10 kg) and includes a Viton seal kit option for replacement needs.