SUN HYDRAULICS
RPCCKWN

***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 RPCCKWN (RPCCKWN) is a pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. Normally closed, this valve opens to the tank port when the inlet pressure reaches the preset level, effectively throttling flow to maintain desired pressure. Known for its accuracy and smooth operation, it features low pressure rise versus flow and moderate response speed. The RPCCKWN is interchangeable with other 2-port relief cartridges of the same frame size, offering flexibility in various applications. It can handle maximum pressures at port 2 and is suitable for cross-port relief circuits, although spool leakage should be considered in such uses. This valve has a minimum setting of 75 psi and is not recommended for load-holding applications due to potential spool leakage. The design incorporates Sun\u2019s floating style construction to prevent internal binding from installation torque or machining variations. The main stage orifice is protected against contamination, enhancing durability and reliability. Cartridges with EPDM seals are compatible with phosphate ester fluids but should not be used with petroleum-based substances as they may damage the seals. The valve has a capacity of 12 gpm (45 L/min) and can operate at pressures up to 5000 psi (350 bar). It features an adjustable screw for setting changes and requires specific torque values for installation and locknut adjustments. With a typical response time of 10 ms and minimal leakage at standard conditions, this cartridge valve provides efficient performance in hydraulic systems requiring precise pressure control.