As referenced, dryers remove excess water from compressed air. With the right type, you'll meet industry standards while protecting your air compressor setup.
There are three types of dryers to consider, refrigerant (fridge), adsorption, and membrane. Each comes with its own benefits to help you balance budgetary concerns and air quality standards.
Refrigerant dryers are the most common type, and typically maintain a PDP of +3 °C/37.4 °F, suitable for most applications. They consist of an air-to-air heat exchanger and air-to-refrigerant heat exchanger. This type of dryer is either air-cooled or water-cooled. Pneumatech also offers non-cycling, cycling and VSD fridge dryers to meet your investment and efficiency requirements.
Adsorption / desiccant
Adsorption or desiccant dryers use hygroscopic material like silica gel to adsorb moisture contained in compressed air. The air flows over the material and is effectively dried. These dryers achieve a PDP from -10 °C/14 °F to -70 °C/-94 °F.
To maintain consistent operations, adsorption dryers come with two drying vessels. The first is used for drying incoming compressed air, while the second is used for desiccant regeneration. There are three types of regeneration methods our dryers use: purge regeneration (“heatless-type dryers”), heated purge, and blower.
Membrane dryers use a process called "selective permeation." They consist of a cylinder housing thousands of tiny hollow polymer fibers with an inner coating. Through selective permeability, these fibers remove water vapor, achieving standard PDP levels of +3 °C/37.4 °F.
PDP is used to define the water content in compressed air. Essentially, it is the temperature at which water vapor condenses at the working pressure. Low PDP values indicate small amounts of moisture in compressed air.
In addition to ensuring the reliability and integrity of your air system, compressed air dryers are essential for meeting ISO 8573-1 standards. This internationally recognized rating dictates how many contaminants, including water, your air is allowed to contain after treatment.
The standard specifies air quality classes, including the acceptable PDP levels. For example, ISO 8537-1 class 1 requires a PDP of -70 °C/-94 °F, while class 4 indicates +3 °C/37.4 °F.
Learn more about our different dryer products here below.
Compressed air dryers play a vital role in various industrial and professional applications, here are just a few examples.
Want to know more about different air compressor dryer types? Check our knowledge library.
Pneumatech offers much more than top-quality compressed air dryers:
- As the air treatment and gas generation specialist, we can meet all your compressed air quality and industrial gas needs. This includes a wide range of filtration equipment and air quality measurement services.
- Our experts are always ready to help. Just share your air quality requirements and they can put together the optimal system for you.
Need help navigating our compressed air dryer offer? Our experts are always ready to put together the solution that best meets your needs.