HOW TO CHOOSE A SCREW PUMP

The screw pump is divided into:

Single screw pump - a pump in which a single screw is engaged and rotated in the internal thread groove of the pump body.
Twin-screw pump - a pump in which two screws are meshed with each other to transport liquid.
Three-screw pump - a pump in which a plurality of screws are meshed with each other to transport liquid.
Below we introduce the selection points of single screw pump:

1. Determine the pressure of the single screw pump:
The maximum output pressure of the single screw pump is determined according to the number of bushing stages, that is, the lead number of the bushing:

1 pole: The maximum working pressure is 0.6 MPa;

2 poles: The maximum working pressure is 1.2 MPa;

4 poles: The maximum working pressure is 2.4 MPa;

Due to the different conditions of the conveying medium, for the medium with severe abrasiveness, please refer to Table 1 to select the series of bushings.

Table 1: Selection of bushing series according to the abrasiveness of the medium

2. Selection of single screw pump speed:

Due to its structural characteristics, single-screw pumps are mostly used to transport liquids with higher viscosity and liquids containing particles, so the choice of the number of revolutions is very critical.

Table 2: Select pump speed according to the abrasiveness of the medium