August 9, 2021
To understand why, we need to understand the difference in how each type of blower creates pressure. Lobe blowers shift air. Any compression (creation of pressure) occurs only when the movement of air hits a surface, creating back pressure. Because of this, lobe blowers can perform without failure regardless of whether or not there is back pressure. This situation often occurs during the air conveying of product. With screw blowers, the compression takes place inside the screw block. If there is no back pressure in the pipe, you will have rapid compression and expansion of the air, which will create a lot of noise and potential pump damage. For this reason, screw blowers are ideally suited for applications where there is consistent back pressure, like the aeration of ponds. If your operation has back pressure, a screw blower is a great option and can lead to significant energy savings.