Rotary Lobe Vacuum Pumps And Blowers

A rotary lobe vacuum pump is a positive displacement pump that uses rotating lobes to generate vacuum.

Two three-bladed rotary lobes are mounted in parallel within the housing. They operate in opposite directions. The pumped medium is trapped through the rotation of the lobes, compressed, and transported to the outlet. The minimal clearance between the lobes and the housing optimizes the internal seal.

The oil-free operation makes rotary lobe vacuum pumps ideal for applications requiring dry vacuum environments. They are used for various applications in industries that require reliable vacuum generation, ranging from wastewater treatment to food processing.

Rotary lobe vacuum pumps and blowers operate according to the proven Roots principle. Two rotary lobes are mounted in parallel within the housing. These three-bladed lobes operate in opposite directions. The rotation of the lobes traps the pumped medium, compresses it and transports it to the outlet.

The lobes do not come in contact with each other or the housing. Thus, no lubricants or operating fluids are required in the process chamber.

The two lobes are driven by a pair of gear wheels located on the shaft ends of the gearbox and separated from the compression chamber. This maintains precise synchronous rotor timing.

Vacuum generation of rotary lobe vacuum pumps and blowers explained in three steps

Simply put, a rotary lobe blower generates slight overpressure while a rotary lobe vacuum pump produces vacuum. They operate according to the same principle but are used in different ways. Rotary lobe blowers are usually directly connected to a system that requires overpressure, while rotary lobe vacuum pumps are typically connected to a backing pump.

Yes, they are. Positive displacement vacuum pumps or blowers move gas or air by repeatedly trapping a fixed volume of the pumped medium and moving it mechanically through a system. They maintain a constant flow and speed regardless of changes in pressure.

There are no differences. These are just different terms used to refer to the same blower technology. The rotary lobe principle was invented by the Roots Brothers in Connersville, Indiana. It was patented in 1860 and named after them.

Rotary lobe vacuum pumps and blowers from Busch are robust, reliable, and cost-efficient. They have several benefits:

Several factors have to be considered when selecting the right vacuum solution. These factors vary depending on the application and the specific needs of your process.

Use our product finder to find your ideal vacuum pump. Or contact us to find out which vacuum solution fits your needs best. Our Busch experts are happy to help!

Rotary lobe vacuum pumps and blowers from Busch have a large number of accessories and design options that enable individual configurations to match any requirement. For example, the innovative acoustic insulation with integrated inlet and outlet silencers reduces noise levels by up to an additional 20 dB(A). Moreover, our rotary lobe vacuum pumps are characterized by low ultimate pressure and best-in-class chamber pump-down time for load lock chambers.