Pressomat VLR by Nocchi Pentair Water Pumps
These are automatic pressure units for distribution networks with single and three phase electrical power supply.
The pumps are controlled by two differential pressure switches with adjustable calibration, by means of an electric control panel supplied with an analogical SM electric card for:
Sequential starting of the pumps
Inversion of starting order
Protection against running dry
Adjustable timing from 0 to 180, for three phase version only
When the system pressure reaches the closing valve of the electric contact of pressure switch 1 the first pumps starts.
If the pressure continues to drop, when the maximum pressure valve of the second pressure switch is reached, the other pump starts. When the pressure value of the network increases, the pressure switches open their contacts, causing the relative pump to be switched off.
At the end of each cycle, the automatic inverter changes the starting order of the pumps (at the cycle pressure switch 1 will be associated to pump 1 at the subsequent cycle to pump 2). In the event that both pressure switches are closed simultaneously, the electronic card delays the starting of the second pump, thus avoiding sharp pressure jolts and overload of the electric power supply.
All units require Pressure Accumulator Vessels
Nocchi Pressomat VLR UK Supplier All Pumps Direct UK