Pneumatic vs. Electric Mixers: Which Is Better for Industrial Mixing?

Choosing between a pneumatic and electric mixer starts with the conditions around your process. Both can handle a wide range of industrial mixing jobs, but the way they produce power creates some important differences.

Before choosing one, look at the material being mixed, the environment, and what utilities are already available in your facility. Those factors can quickly point you toward the better option.

Key Takeaways

• Pneumatic mixers are often a better fit for environments involving flammable or volatile materials because they run on compressed air rather than an electric motor.
• Electric mixers can be easier and more energy efficient to operate when a facility does not need the safety advantages of pneumatic equipment.
• The right choice also depends on viscosity, required torque, available utilities, batch size, and the conditions around the mixing area.

When Does a Pneumatic Mixer Make More Sense?

A pneumatic mixer uses compressed air to power the mixing shaft. That makes air powered equipment especially useful when working around solvents, coatings, chemicals, inks, or other materials where flammable vapors could be present. OSHA requires electrical equipment used in hazardous classified locations to be appropriate for that specific environment, making the conditions around the mixer an important part of equipment selection.

Pneumatic mixers can also provide strong torque for thicker materials, and speed can be adjusted by controlling the air supplied to the motor. That makes them useful for applications involving adhesives, coatings, slurries, and other materials where resistance can change during mixing. Facilities that already have a dependable compressed air system may find an air mixer fits easily into their existing setup.

When Is an Electric Mixer the Better Option?

For many nonhazardous applications, an electric mixer offers a straightforward setup. Arrow’s electric mixers are available in different speed and torque ranges, allowing facilities to match the motor more closely to the viscosity, vessel size, and mixing requirements of the application.

Electric equipment can also make sense when compressed air is limited or unavailable. Compressed air requires energy to produce, and the U.S. Department of Energy notes that more than 80 percent of the input energy used by air compressors can be lost as heat. When an application does not specifically benefit from pneumatic power, an electric mixer may provide a more efficient way to keep the process moving.

What Else Should You Consider Before Choosing?

Power source is only one part of mixer selection. A thin liquid that needs fast circulation has very different requirements than a thick adhesive or slurry. Torque, RPM, viscosity, vessel size, and impeller design all affect whether the mixer can create the movement you need throughout the batch.

It is also worth considering the equipment already in your facility. A pneumatic mixer needs a clean and consistent air supply to perform properly. Problems such as pressure drops, leaks, or moisture can hurt performance, which we cover in more detail in our guide to common pneumatic mixer air supply problems. Electric mixers, meanwhile, need an appropriate electrical supply and should be selected with the operating environment in mind.

Need Help Choosing Between Pneumatic and Electric?

If you are comparing pneumatic and electric mixers, contact Arrow Mixing Products to discuss your application. We can help you narrow down the right mixer based on your material, viscosity, operating environment, and mixing requirements.