3NM series

3NM series

Characteristics

3-Pump pressurisation installations with optional frequency control.

  • Max. power: 165 kW
  • Max. capacity: 580 m3/hr
  • Max. capacity: 9667 l/min
  • Max. capacity: 580000 l/hr
  • Max. discharge head: 95 m
  • Max. pressure: 10 bar
  • Speed: 2900 rpm
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The 3NM 3-pump pressurisation installations have three standard-priming cast-iron centrifugal pumps. The suction sides have non-return valves and ball valves and the pressure sides have ball valves. The manifolds on the suction side and pressure side are made of stainless steel AISI 304. The manifold on the pressure side has a pressure gauge and two connections for 20 litre diaphragm tanks to be mounted should you so wish.

These installations are available with pumps that have a fixed speed controlled by three pressure switches or a variable speed controlled by 1 or 3 frequency controls. In both versions the control box is equipped with a microprocessor that amongst other things, ensures that the pumps start in turn so that a similar number of operating hours is reached.In addition, the unit has a cascade control system that ensures that the second and/or third pump starts automatically when more water is drawn up and the first and/or second pump can no longer reach the desired pressure. The control box is also provided with dry run protection, thermal protections for the pumps and various alarms.

We recommend that you always combine these installations with diaphragm tanks as mentioned above, in order to minimise the number of shut-downs.

Material

  • Cast iron
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