Serie ST STI

Description

The ST-STI 6″ Constructive Series are multicellular submerged centrifugal electric well pumps for domestic, industrial, irrigation and pressurised water installations by means of hydraulic accumulators.

They are designed for the extraction of water from deep wells and reduced drilling diameter.
Its modular composition is formed by the hydraulic pump, and the submersible electric motor, which is coupled to the bottom of the pump.
They can work vertically or horizontally (with cooling bell).
The pump is supported by the tubes of columna´, which expel the water to the outside.
Pumps cannot run dry
Maximum liquid temperature 30º
Maximum sand 50 gr/m3
Built-in check valve.
The powers vary from 2 to 40 hp in three-phase to 220, 380, 400, 415 volts and from 2 to 3 hp in single-phase.

The installations of the series consist of three parts:

1- Hydraulic body

The hydraulic body is made up of a suction body, a discharge body, and stages or phases, made up of closed multi-channel axial type diffuser and impeller bodies.
The different stages are cased in a stainless steel casing that guarantees a high resistance to the whole pump and avoids possible deformations.
The diameter of the group is 6″.
The set of impellers driven by the central shaft that transmits the power of the motor.

2- Submersible electric motor

Electric submersible motor of 50 or 60 Hz with IP-68 protection that supports the axial thrust of the pump, by means of a widely dimensioned axial bearing.
The stator winding is flooded in oil or water, the bearings are lubricated by the internal liquid, and require no maintenance.
These engines are manufactured by the most prestigious specialized firms.
The coupling flanges are designed in accordance with NEMA standards, simplifying maintenance and repair operations.

3- Hydraulic column

The hydraulic column is made up of sections, depending on the depth of the well. These sections can be formed by normal commercial piping or by steel flanged piping.