The vacuum unit with electronic vacuum control represent the maximum evolution which regards the AIRBLU central vacuum system for industry sector and services sector.

The vacuum unit is made up by the following parts:

§ skeleton made of painted plate with strong constitution;

§ lateral channel exhauster with induction motor;

§ control board with low-tension prearrangement of inlet valves and analogue connection for interaction with filter cleaning automatic system, which is in the dust trap;

§ inverter for electronic control of the motor performances: it is controlled by the impulses which are transmitted by the pressure transducer.

The meaning of the working of the vacuum unit with electronic pressure control lies in the information which are transmitted from the transducer to the inverter (excluding the installation of the vacuum valve). This way, the vacuum value is persevering in a definite value which has been set out during the testing phase. The continuous regulation of the turbine revolutions varies the air capacity on the ground of the number of operators who are using the installation. Like this, you reach the excellent functioning and you minimize the energetic consumption at the same time.

The vacuum unit with electronic vacuum control is equipped with a display on board which allows the setting out and the visualisation of the functioning parameters, such as:

• absorption frequency;

• turbine motor revolutions;

• functioning time of the suction unit;

• percentage of vacuum in operation;

• anomalies in the functioning (overload, overvolt, overtemp, ect.)

By using the vacuum unit with electronic pressure control the installation is easier:

- it is no necessary to use particular devices in the power grid;

- there is no need to settle the vacuum valve any more.