Working Principle

The full name of submersible water pump is STM deep-well submersible pumps. The STM pumps are designed for permanently immersed operation. The motor is connected to the pump by means of a support design in accordance with NEMA standards. The operating principle is that of multistage centrifugal pumps. The impellers, supported by the motor shaft, rotate inside vane diffusers which transfer the liquid leaving each impellers towards the suction opening of the next, once the liquid has passed through the series of impellers it is expelled via the delivery opening. Each impeller and its respective vane diffuser constitutes a pumping stage which, according to the operating principle of centifugal machines, generates a pressure increase in the fluids which is added to each subsequent pressure increase induced by the other stages in series.

Pump Installation and Application

These pumps are suitable for pumping clean water or fluids with a sand content of no more than 150g /m³. These pumps are suitable for water supply from wells or reservoirs, for domestic use, for civil and industrial application, for garden use and irrigation.

Performance
These pumps combine the advantages of a submersible pump with the performance of a centrifugal pump. In fact they assure:

-outputs having high absolute values
-ample and particularly stable curves

Structural Characteristics
Motor: full obturated screen motor Rewind able motor
Three-phase: 230v±10% (220-240v), frequency 50Hz
Three-phase: 440v±10% (380-415v), frequency 50Hz
single-phase: 230v±10% (220-240v), frequency 50Hz
Other voltage.
Frequency 60Hz
Other mechanical seal
Cable gland with cable fasteners

Control box with capacitor and Special features usually is on request.