The RTD-90 series is a series of ultra-high pressure plunger pumps produced by introducing advanced technologies. The pump shaft is positioned vertically, featuring a compact structure, small size, light weight, high efficiency, etc. The transmission is smooth and reliable, with low friction coefficient, high lubrication performance, low noise, low temperature rise at the power end, and the ability to operate continuously for a long time. The hydraulic end adopts imported German technology, with a reasonable design, easy maintenance, reliable operation, and suitable for various traffic sign line cleaning, airport runway rubber line cleaning, etc.