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Choose the right motor in three easy steps - Step 1 Ascertain the operating environment of the motor

Marie-Charlotte Messier
by Marie-Charlotte Messier on Apr 2, 2019 8:52:08 AM

It is easy to be lost in the ocean of motors, but if you are thinking of using air motors then you are on the right track. The next step ? Figure out which air motor corresponds to your needs. In order to do so, please follow this easy three stages process in order to find your future motor:

-> GO TO STEP 2: Ascertain the torque of an air motor

-> GO TO STEP 3: Ascertain the necessary power of an air motor

1# Ascertain the operating environment of the motor

Air motors are often used in specific applications. The first question you therefore need to ask yourself is: In which environment will it run ? In order to help you, here are seven typical applications:

  1. 1. A humid environment resistant motor

Air motors are, by definition, far more resistant to humidity and much more robust than electrical motors.

As corrosion is the number one enemy of waterfront and port areas industries, and in order to keep valves, hoists and other machines in good operating conditions, it is necessary to protect them.

Unlike the electrical motor which needs a protection of all it’s electrical network and of itself, the air motor only needs a filtration and lubrication system in order for the pressurized air to be clean and dry.

2. A water resistant motor

As using a motor in humid areas, the use of a motor in water can corrode and cause huge short circuits risks.

Electrical motors in water areas are subject to strict protection index norms (IP) that aim to protect them from water and dust entry. In addition, depending on the wished use and depth, the motor as well as its electrical network would need protection.


As for the air motors, they always carry a six-bar air pressure, which prevents any water from going in the motor! The simple use of stainless steel  for the parts of the motor in contact with water and the setting of waterproof seal will be enough to avoid any risk of corrosion.

All the risks are then avoided: no more corrosion inside or outside of the motor and no more short circuits because no electricity source.

3. A dust resistant motor

Dust is a permanent risk in many sectors and its direct consequence is the overheat of the motor.

Indeed, the dust risks to clock the filters and the cooling orifices leading to an overheat, or, dust entering in the motor which could damage its internal components.

Here is why our clients use in those cases an air motor: the air entering the motor is not the ambient air, it’s a dry, lubricated and clean air. Indeed, an air motor does not heat because, as it runs, it gets colder.

4. A high temperature resistant motor

In order to avoid an overheat of the electrical motor in case of high temperatures, they need to be oversized. Most of the time, users realise than even this technique is not enough even though  it increases the costs.

For all these reasons, the air motor is your best alternative, as its motor cools while running, the components are the only thing we need to be careful. Special seals and oil for high temperature and there you go ! You can use the air motor up to 130 degrees without any oversizing.

5. A motor suited for the nuclear sector

Nuclear always involves radiations. Ant it is the principal risk for components of electrical motors. They can be severely affected due to electromagnetic compatibility problems.

The risk of radiation interference is inexistent with pneumatic motors due to the absence of electricity. For example, in the nuclear industry, it is recommended to use air motors because the air can be taken off and released to a non-contaminated zone in order to eliminate any risk of contagion.

6. A motor for clean environments

For our clients needing motors operating in “white rooms” we have thought of stainless steel motors without lubrication, resisting sterilisation temperatures and cleaning products. The motor will be perfectly clean.

7. A motor suitable for Inflammable and explosive environments

The air motor doesn’t overheat, doesn’t make sparks, and doesn’t need the installation of a protected electric network. This is why they are the best alternative to electrical motors in Atex situations. Indeed, you will only need clean, filtrated, dry air in order for it to work. This is why they are nowadays the best alternative to electrical motors.

-> GO TO STEP 2: Ascertain the torque of an air motor

-> GO TO STEP 3: Ascertain the necessary power of an air motor

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