SUN HYDRAULICS
RPCCFWN

***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 RPCCFWN (RPCCFWN) is a pilot-operated, balanced-piston relief cartridge designed for precise pressure regulation. This valve is normally closed and activates when the inlet pressure reaches the set threshold, opening to the tank port and throttling flow to maintain the desired pressure. It boasts low pressure rise versus flow, smooth operation, quiet performance, and moderate speed. The RPCCFWN can handle maximum pressure at port 2, making it suitable for cross-port relief circuits; however, users should consider spool leakage in such applications. It is not recommended for load-holding applications due to this leakage factor. The valve setting is directly affected by back pressure on the tank port at a 1:1 ratio. Featuring a protected main stage orifice against contamination, it incorporates Sun's floating style construction to reduce risks of internal binding from excessive installation torque or machining variations. This model fits into cavity T-162A with a capacity of 12 gpm (45 L/min) and operates up to a maximum pressure of 5000 psi (350 bar). Its typical response time is around 10 milliseconds with minimal valve leakage under specified conditions. Adjustments are made via an internal hex screw with specific torque requirements for both installation and locknut adjustments. The cartridge can be configured with EPDM seals for systems using phosphate ester fluids but must avoid petroleum-based substances which could damage these seals.