SUN HYDRAULICS
RPGTCAN

***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 RPGTCAN (Material Number: RPGTCAN) is a pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. This valve opens and then ramps closed at a constant speed, independent of settings and flows. It features an adjustable screw that sets the maximum relief and minimum threshold pressures. The RPGTCAN is interchangeable with other 2-port relief cartridges, making it versatile for various applications. It can handle maximum pressure at port 2, making it suitable for cross-port relief circuits but not for load-holding applications. When inlet port 1 pressure exceeds the threshold, it opens to tank port 2, with the pilot section moving forward steadily to increase setting by compressing the pilot spring until a mechanical stop is reached. This valve offers protection against pressure transients in pumps and motors due to sudden load changes, particularly useful for variable displacement pumps where the displacement mechanism may lag behind these transients. It's also beneficial in hydrostatic drives by mitigating jerks from sudden reversals and is suitable for cross-port applications. When paired with a switching device, it mimics ramp characteristics typically provided by proportional valves. Additionally, starting small power units against this anti-shock relief can enhance pump longevity. The RPGTCAN incorporates Sun's floating style construction to minimize internal part binding from excessive installation torque or machining variations. It supports a capacity of 50 gpm (200 L/min) at a maximum operating pressure of 5000 psi (350 bar), with factory settings established at 4 gpm (15 L/min). The response time is typically around 2 ms with a pressure ramp-up time between 200-400 ms. Adjustment requires up to 4.5 clockwise turns, and installation torque ranges from 45-50 lbf ft (61-68 Nm). The valve weighs approximately 1 lb (0.45 kg) and uses Viton seal kits for maintenance.