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Air Movers

The different industrial ways to blow air for pneumatic conveying

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Section summary
1. Introduction
2. The different types of air movers

1. Introduction

Blowers constitute the air movers in many pneumatic conveying systems running lean phase. They can be placed at the beginning of the line, delivering an overpressure, or at the end of the line to produce a vacuum. The most common type of blower used for this purpose is the Roots blower, a volumetric blower (positive displacement) that can be operated either in pressure or vacuum without specific changes.

2. The different types of air movers

Table 1 : The different types of air movers for pneumatic conveying lines, their use and operating pressure

Air mover Service Typical operating pressure
Roots blower Dilute phase pneumatic conveying
Can also be used in vacuum mode
400-500 mbar
Fan Very dilute and short distance pneumatic conveying
Can also be used connected to the receiver's filter, in addition to a Roots blower
-100 mbar
Compressed air
Dense phase pressure conveying
The compressed air can be taken directly from the compressed air network of the factory, or generated by a compressor
> 1 bar
Vacuum pump
Dense phase vacuum conveying
Typically claws vacuum pumps
-700 mbar