SUN HYDRAULICS
RPETLCV

***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 RPETLCV (RPETLCV) 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 ramps closed at a constant speed, independent of settings and flows. The adjustable screw allows for setting the maximum relief and minimum threshold pressures. It is physically and functionally interchangeable with all 2-port relief cartridges, having the same flow path and cavity for a given frame size. This valve can handle maximum pressure at port 2 and is suitable for cross-port relief circuits but not for load-holding applications. Upon exceeding the threshold setting at inlet port 1, the valve opens to tank port 2, with the pilot section advancing steadily to increase the setting by compressing the pilot spring until a mechanical stop is reached. The RPETLCV provides protection against pressure transients in pumps and motors due to sudden load changes, particularly useful for variable displacement pumps. It also reduces jerks in hydrostatic drives during sudden reversals and can be used in cross-port applications. When combined with a switching device, it offers ramp characteristics similar to proportional valves. Starting small power units against an anti-shock relief extends pump life. The back pressure on tank port 2 adds directly to the valve setting at a 1:1 ratio. It incorporates Sun's floating style construction to minimize internal part binding from excessive installation torque or machining variations. The cartridge fits Cavity T-10A Series 1 with a capacity of 25 gpm (95 L/min) and operates up to a maximum pressure of 5000 psi (350 bar). Its response time is typically around 2 ms, with a pressure ramp-up time between 100-300 ms. Adjustments are made via an internal hex screw, while installation requires specific torque settings for optimal performance. The model weighs approximately .30 lb (.15 kg) and includes Viton seal kits as standard.