Vacuum or Blower Mode? How a 2RB Side Channel Blower Does Both

One of the most common questions about a 2RB side channel ring blower sounds very simple:
“Is this machine only for blowing air, or can it also create vacuum?”

The short answer is: it can do both.
The longer and more useful answer depends on how the blower is connected and used.

A Common Misunderstanding About 2RB Blowers

“Isn’t it just a blower?”

Many users see the word blower and assume the machine can only push air out. Others hesitate because they need suction and are not sure if a side channel blower is the right choice.

This confusion usually comes from focusing on the name, not the working principle.

One Machine, Two Working Modes

Same Blower, Same Impeller

A 2RB side channel blower uses the same motor and impeller whether it is working in vacuum mode or blower mode. Internally, nothing changes. There are no extra parts and no mode switches inside the machine.

What changes is how air enters and leaves the blower.

How the Interface Defines the Function

Vacuum Mode

When air is drawn in through the inlet and then discharged to the atmosphere, the 2RB works as a vacuum source. This setup is commonly used for suction, lifting, holding, or vacuum table applications.

Blower Mode

When air is taken in from the atmosphere and pushed out through the outlet into a system, the same blower works in pressure mode. This is ideal for aeration, drying, cooling, and light pneumatic conveying.

In both cases, the internal air acceleration process is exactly the same.

Choosing the Right Mode for Your Application

Understanding this difference helps avoid many performance problems. If your process needs steady suction, use vacuum mode. If it needs stable airflow and pressure, use blower mode.

That is why engineers like the 2RB side channel blower: one machine, flexible use, simple setup.

If you are unsure which mode fits your application better, looking at airflow direction is often more useful than looking at the machine name.

ring blower product information

Web: http://www.greentechblower.com  (Group Web)  ‖  http://www.zqblower.cn  (Chinese)  ‖ http://www.ringblower.cn/ (Ring blower)  ‖  http://www.china-blower.com  (Roots Blower)