SUN HYDRAULICS
RPETCAN

***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 RPETCAN (Material Number: RPETCAN) is a pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. It features a mechanism that opens the valve to relieve pressure and then ramps closed at a consistent speed, regardless of settings and flow rates. The adjust screw allows for setting the maximum relief and minimum threshold pressures. This cartridge is interchangeable with other 2-port relief cartridges, sharing the same flow path and cavity for its frame size. It accepts maximum pressure at port 2, making it suitable for cross-port relief circuits but not for load-holding applications. When inlet port 1 exceeds the threshold pressure, the valve opens to tank port 2, with the pilot section gradually increasing the setting by compressing its spring until a mechanical stop is reached. This provides protection against pressure transients from sudden load changes, especially in variable displacement pumps where response may lag. The valve also helps mitigate jerks in hydrostatic drives during sudden reversals and can emulate ramp characteristics typically provided by proportional valves when used with switching devices. The RPETCAN model has a capacity of 25 gpm (95 L/min) and operates at a maximum pressure of 5000 psi (350 bar). Its control pilot flow ranges from 10 to 25 in\u00b3/min (0.16 to 0.41 L/min), with typical response times around 2 ms. The adjustment requires approximately 4.5 clockwise turns to increase settings, while backpressure on port 2 directly adds to the valve setting at a 1:1 ratio. The cartridge incorporates Sun\u2019s floating style construction for minimized binding risks due to installation torque or machining variations, weighing approximately .30 lb (0.15 kg).