Table of Contents
What is the purpose of an air dryer on a compressor?
A compressed air dryer is a piece of equipment designed to separate water vapor or moisture (de-humidify) from industrial process air. In the typical system, a compressor draws in humid air and compresses it, which raises the air temperature and then cooling the air condensing water vapor out of the unit.
What is the purpose of air dryer?
The basic function of the air dryer is to remove moisture from the air by cooling it with a refrigerant. Thus, the water vapor is condensed, and the air can be compressed. The result is dry compressed air, which can be used in compressed air equipment without causing any damage.
Why is it necessary to dehydrate the air?
Methods for Drying Compressed Air Air drying is necessary for the simple fact that while air itself is compressible, water isn’t. While the air is cool, the moisture condensates and can ultimately be drained, after which the reheated air should be moisture-free.
How do I choose an air dryer for my air compressor?
The following information is required to properly select an air dryer:
- Maximum air flow in standard cubic feet per minute (scfm)
- Inlet air pressure.
- Inlet air temperature.
- Ambient air temperature (and water temperature if condenser is water-cooled)
- Desired pressure dew point.
- Utilities required.
- Installation.
Why air dryers are required explain its types?
But if a circuit requires further treatment, air dryers are a must. They remove most or all of the water in compressed air before it reaches critical components or processes. Here’s a look at the major types. Refrigerated air dryers remove water by cooling the compressed-air temperature and causing condensation.
What is dew point in air compressor?
Dew point is the temperature in which water vapor in your compressed air is no longer vapor, and changes to a liquid form (condensation). Large amounts of water in your compressor and/or compressor air lines can cause bacteria or mold to form, as well as pushing moisture into your compressed air.
Why drying is needed?
Why is drying important? After threshing, the moisture content of grains remains generally higher than the desired for safe storage of grains (13-14%). The aim of drying is to lower the moisture content of the grain for safe storage and further processing.
Do I need a dryer for my air compressor?
Air dryers are essential for air compressors. They keep compressors free of moisture, and prevent condensate and rust problems from occurring. Accumulation of this moisture, over time, can cause serious damage to the compressor. It can corrode valves, pipes and even machinery controls.
What is dew point of air dryer?
Refrigerant dryers use a refrigeration system and heat exchangers to drive down the temperature of compressed air to 2°C to 5°C (36°F to 41°F), which is also the dew point of the air. The excess water vapor condenses and is separated from the air, and the air is then warmed up.
What is CFM air dryer?
Compressed air dryers are commonly rated to achieve a specific moisture level (e.g. 40°F pressure dew point) for a certain volume of air flow (cfm). This nominal flow rating is typically based on a set of standard conditions (100 psig, 100°F inlet temperature, and 100°F ambient temperature).
What is the purpose of a compressed air dryer?
Here is all the information you need to know about compressed air dryers for your business. The purpose of air dryers is to suppress the dew point of your compressed air by removing water from it. Compressed air can contain moisture, which, under the right conditions, can reach the dew point temperature and condense into a harmful liquid.
What’s the best way to dry compressed air?
How to dry compressed air. There are a few ways to dry compressed air. You can lower the temperature and then re-heat it. Condensate will form at the low temperature, where the water can be discharged. After re-hearting, the air is dry. This process is used in refrigerated compressed air dryers.
How does a desiccant compressed air dryer work?
This process is used in desiccant compressed air dryers. Refrigerated compressed air dryers use a small refrigerator to cool down the compressed air to about 3 degrees Celsius. At this low temperature, condensate will form which is removed by a condensate trap.
What should the compressor temp be in a air dryer?
Air dryers have a maximum specified inlet temperature. If this temperature is exceeded, you can either damage parts of the dryer, or the dryer just doesn’t have enough capacity to reach the desired dewpoint.Some compressors have an after-cooler installed, in which case the compressed air will be around 40 degrees Celsius.