industrial air dryers

Selecting The Right Size And Capacity For Your Industrial Air Dryer


Industrial air dryers are essential components in many manufacturing and processing operations. They play a critical role in removing moisture from compressed air, ensuring the efficient and reliable operation of pneumatic equipment and preventing moisture-related issues. However, selecting the right size and capacity for your industrial air dryer is crucial to maximize its effectiveness and efficiency. In this blog post, we will explore the key factors to consider when choosing the appropriate size and capacity for your industrial air dryer.

  • Assess Your Compressed Air Requirements

Before diving into the specifics of air dryer sizing, it’s essential to understand your compressed air system’s requirements. Start by assessing the following factors:

Flow Rate (CFM): Determine the maximum and minimum compressed air flow rates your operations require. This information is crucial for selecting an air dryer that can handle the varying demands of your system.

Inlet Air Temperature: Consider the temperature of the compressed air entering the dryer. The inlet temperature affects the dew point and influences the type of air dryer you need.

Pressure: Identify the operating pressure of your compressed air system. Most industrial air dryers are designed to operate within a specific pressure range, so this information is vital for proper selection.

Ambient Conditions: Take into account the ambient conditions of your facility, including temperature and humidity. These factors can impact the performance of your air dryer.

  • Determine the Required Dew Point

The dew point is the temperature at which moisture in the compressed air starts to condense into liquid form. The required dew point varies depending on your specific application. For example, some industries, like pharmaceuticals or food processing, require extremely low dew points to prevent product contamination. In contrast, less critical applications may only need a standard dew point.

  • Choose the Right Type of Air Dryer

There are several types of industrial air dryers available, each with its advantages and limitations. The most common types include:

Refrigerated Air Dryers: These are suitable for most industrial applications and can achieve dew points between 35°F to 50°F (1.7°C to 10°C).

Desiccant Air Dryers: Ideal for applications requiring lower dew points, desiccant dryers can reach dew points as low as -40°F (-40°C).

Membrane Air Dryers: These are used for small-scale applications and can achieve dew points around 40°F to 50°F (4.4°C to 10°C).

Heatless or Heated Purge Air Dryers: These are variations of desiccant dryers with different regeneration methods, suitable for specific requirements.

  • Calculate the Correct Size and Capacity

Once you have gathered all the necessary information, you can calculate the correct size and capacity of your industrial air dryer. Manufacturers provide sizing guidelines and charts based on the factors mentioned above, allowing you to match your specific requirements to a suitable dryer model.

  • Consider Future Expansion

Finally, when selecting your industrial air dryer, it’s wise to plan for future growth or changes in your compressed air system. Choose a dryer that can accommodate potential increases in air demand without overtaxing the equipment or sacrificing efficiency.


Selecting the right size and capacity for your industrial air dryer is a critical decision that directly impacts the performance and efficiency of your compressed air system. By carefully assessing your requirements, determining the appropriate dew point, choosing the right type of dryer, and calculating the correct size, you can ensure that your industrial air dryer meets your operational needs and contributes to the reliability and productivity of your facility. If in doubt, consult with a compressed air specialist or manufacturer to make an informed decision.