These vacuum producers are by far most popular. These units have variable volume with a constant vacuum. By being able to vary its volume on system usage makes it the ideal choice for multi-operator systems. Horsepower usage decreases as the demand drops and provides constant energy savings. From 20 HP small exhausters to dual 200 HP "Lead / Lag" systems.
Positive Displacement Pumps
These blowers basically have the opposite performance of the multi-stage centrifugals. They provide a constant volume and variable vacuum or pressure. The variable vacuum is ideal for moving heavy product, conveying product extremely long distances, and for applications that require long vertical lifts.