Selecting the right compressed air dryer

24 Jun.,2024

 

Selecting the right compressed air dryer

If your ambient temperature and incoming air are over 40°C/104°F, typically a high-temp dryer is recommended. Installing an after cooler after the compressor is also advised.

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If you need very dry air (PDP of -40°C/-40°F or -70°C/-94°F) an adsorption dryer is your best choice. Adsorption dryers can reach pressure dew points as low as -70°C/-94°F.

That makes adsorption dryers the ideal solution for very cold climates, as they can help avoid ice formation in pipes and applications. They are also widely used in applications such as mold prevention, medical applications, textiles, and food factories.

These dryers use desiccant material to adsorb and remove the humidity from compressed air. Adsorption dryers consist of two towers. While one tower is drying air, the other is removing the moisture from already saturated desiccant. This so-called regeneration process prepares the desiccant for a new drying cycle.

Adsorption dryers also come in different technologies such as heatless dryers, heated purge dryers or blower purge and zero purge dryers.

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Select the right air compressor dryer

A refrigerated non-cycling dryer is an excellent cost-effective choice for anyone looking to improve their compressed air quality. The term "non-cycling" means this type of dryer constantly operates refrigeration. It also utilizes a hot bypass valve to redirect the coolant, even at a less than full load condition.

In a refrigerated air compressor dryer, the air temperature is lowered to 3° Celsius (37° Fahrenheit). This drop allows for water to move from a vapor state to dry air. Non-cycling dryers are simple and reliable machines, meaning they're easy to maintain.

This type of refrigerated dryer is affordable, and comes with a relatively low cost of investment. In addition, non-cycling dryers are quick and straightforward to install and operate. This accessibility makes them a market standard in performance and quality, while exceeding expectations.

A non-cycling air compressor dryer works well with any rotary screw compressor. If you use a piston air compressor, a high temperature version is recommended.

Since these machines run nonstop, energy consumption at full or low load is nearly the same. Therefore, these units are less energy efficient than other options on the market. If electricity costs are a priority, you may want to check out a cycling dryer.

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