SUN HYDRAULICS
RPGTCCN

***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 RPGTCCN (Material Number: RPGTCCN) is a pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. This valve is engineered to open and ramp closed at a consistent speed, independent of settings and flows, making it highly reliable in dynamic applications. The adjustment screw allows precise determination of both maximum relief and minimum threshold settings. Notably, this model is interchangeable with other 2-port relief cartridges in terms of flow path and cavity size for a given frame size. It can handle maximum pressure at port 2, making it suitable for cross-port relief circuits but not for load-holding applications. The RPGTCCN activates when the inlet port 1's pressure exceeds the threshold setting, opening to tank port 2. This action provides protection against pressure transients caused by sudden load changes, which is especially beneficial for variable displacement pumps that may not respond quickly enough to such fluctuations. Additionally, it protects hydrostatic drives by reducing jerks during sudden reversals and can be used with switching devices to mimic proportional valve ramp characteristics. This cartridge can also extend pump life by allowing small power units to start against an anti-shock relief. Back pressure at tank port 2 adds directly to the valve setting at a 1:1 ratio. The valve incorporates Sun's floating style construction to minimize internal binding due to installation torque or machining variations. Key specifications include a capacity of 50 gpm (200 L/min), maximum operating pressure of 5000 psi (350 bar), typical response time of 2 ms, and adjustable settings through 4.5 clockwise turns. The RPGTCCN is constructed with a hex size of 1-1/8 inches (28.6 mm) and requires an installation torque between 45-50 lbf ft (61-68 Nm).