SUN HYDRAULICS
RPKECNN

***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 RPKECNN (Material Number: RPKECNN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. These normally closed, pressure-limiting valves open quickly when the inlet port pressure reaches the valve setting, directing flow to the tank port to limit pressure rise. With low pressure rise versus flow and rapid response times, these valves are ideally suited for applications requiring quick opening and closing. The RPKECNN model can handle a maximum operating pressure of 5000 psi (350 bar) and offers a typical response time of 2 milliseconds. It features a main stage orifice protected by a 150-micron stainless steel screen and incorporates Sun's floating style construction to minimize internal part binding due to installation torque or machining variations. This model is not suitable for load-holding applications due to spool leakage and should be considered carefully in cross-port relief circuits as backpressure on the tank port directly affects the valve setting at a 1:1 ratio. The valve accepts maximum pressure at port 2 and is functionally interchangeable with other two-port relief cartridges of the same frame size. Installation requires a torque of 350 - 375 lbf ft (474 - 508 Nm), with adjustments made via an internal hex screw. The RPKECNN model weighs approximately 2.50 lb (1.15 kg) and utilizes Viton seals for reliability in various environments.