AH-21 Hydro-pneumatic pump
Hydropneumatic pump of low weight and minimum sound level, which is very comfortable to work in any task that requires a hydraulic pressure obtained from a compressed air intake. It has a safety valve to prevent discharges. The pedal acts as a distributor, pumping oil to the cylinder or letting it return as press "press" or "release". In the resting position, the pump maintains the pressure.