When it comes to quickly and effectively moving the substantial volume of air needed in vacuum hold-down and lifting applications, regenerative blowers—whether they are single-stage or two-stage—are the recommended option. Regenerative blowers are not like displacement compressors or positive vacuum pumps. A regenerative blower regenerates air molecules by using a non-positive method of displacement to create pressure or vacuum. 
There is a wide variety of air-handling equipment available, with regenerative blowers likely the least understood type currently in use. On the other hand, a regenerative blower is frequently the most economical means of creating vacuum or pressure when the specifications of a given application fall within its range.
The distinctions between two-stage and single-stage regenerative blowers
Single-stage regenerative blowers are used in numerous vacuum hold-down and lifting applications. Before being exhausted, the air molecules produced by this kind of regenerative blower go through the blower’s housing once. However, when compared to single-stage regenerative blowers, the vacuum or pressure capabilities of two-stage regenerative blowers are nearly twice as high.
Regenerative blowers are designed with a direct drive configuration rather than a belt drive in the majority of plant applications. The electric motor’s shaft houses the direct drive impeller. After that, it spins at the motor’s speed, which is typically between 2900 and 3500 RPM.
Although a two-stage regenerative blower functions similarly to a single-stage setup, there is one important distinction. Both create pressure and vacuum as a result of the impeller’s repeated strikes on air molecules. However, in a two-stage unit, the airflow is guided by internal porting and ends up behind the impeller. The impeller blades strike the air molecules twice, causing them to complete another revolution around the impeller.
The variety of the following applications demonstrates how regenerative blowers provide a flexible solution for vacuum holding and lifting:
- Packaging
- Pick and place
- Automated materials handling
- Loading and unloading
- Clamping
- Paper Transport
- Palletizing
