Tunneling machine for Breaks the material from the Tunnel Phase

The hydraulic speed variators with electronics control is a SOLUTION for a DOSING PUMP SYSTEM used in TUNNELLING MACHINE.

In this application a very wide speed range is requested (from 1500 to 0 rpm) set by 4-20 mA signal with precision of 1 revolution over 1500, incorporated soft-start with high torque at low speeds.