SUN HYDRAULICS
RPCCKAE

***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 RPCCKAE (RPCCKAE) is a pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. This normally closed valve opens to tank port 2 when the inlet port 1 pressure reaches the set threshold, effectively throttling flow to maintain desired pressure levels. Known for its accuracy and smooth operation, this valve features a low-pressure rise versus flow, making it suitable for applications requiring moderate response times and quiet performance. The RPCCKAE can handle maximum pressures up to 5000 psi (350 bar) and offers a capacity of 12 gpm (45 L/min), with factory pressure settings established at 4 gpm (15 L/min). The valve's design enables interchangeability with other two-port relief cartridges of the same frame size, facilitating easy integration into existing systems. It is particularly suited for cross-port relief circuits, although users should consider spool leakage in such configurations. A minimum setting of 75 psi (5 bar) applies across all spring ranges, but it is not recommended for load-holding applications due to potential leakage. Additionally, back pressure on the tank port directly affects the valve setting at a 1:1 ratio. Constructed with Sun's floating style to minimize binding risks from installation torque or machining variations, the RPCCKAE ensures reliable performance even under challenging conditions. The main stage orifice is protected against contamination, while EPDM seal configurations accommodate phosphate ester fluid systems. The valve requires specific installation torques and adjustments, with detailed specifications provided for proper setup and maintenance.