SUN HYDRAULICS
RPGTCWV

***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 RPGTCWV (Material Number: RPGTCWV) 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 then ramp closed at a constant speed, which is independent of settings and flows. It features an adjustable screw that determines both the maximum relief setting and the minimum threshold setting. Notably, all 2-port relief cartridges, except pilot reliefs, are interchangeable in terms of flow path and cavity for a given frame size. The valve can accept maximum pressure at port 2, making it suitable for cross port relief circuits but not for load-holding applications. When inlet pressure at port 1 exceeds the threshold setting, the valve opens to tank port 2 while the pilot section moves forward steadily to increase the setting by compressing the pilot spring until a mechanical stop is reached. This valve provides critical protection for pumps and motors from pressure transients caused by sudden load changes, particularly in variable displacement pumps where displacement mechanisms may be too slow to react. It also protects hydrostatic drives by minimizing jerks from sudden reversals and supports crossport applications effectively. The valve can mimic ramp characteristics typical of proportional valves when used with a switching device, enhancing its versatility in various hydraulic systems. Additionally, it allows small power units to start against an anti-shock relief to extend pump life. Key specifications include a capacity of 50 gpm (200 L/min), maximum operating pressure of 5000 psi (350 bar), and response time typically around 2 ms with a pressure ramp-up time between 200-400 ms. The adjustment mechanism allows up to 4.5 clockwise turns to increase settings with specific torque requirements for installation and adjustment components. The model weighs approximately 1 lb (0.45 kg) and utilizes Viton seals available under seal kit number 990303006.