Air Dryers. If you're compressing air, there's a good chance you're going to need an air dryer! Air dryers are ancillary pieces of compressed air equipment used to help remove excess moisture from compressed air. Dryers can either be integrated into the air compressor itself or standalone, though having an integrated dryer does result in a decreased compressor footprint. Technology-wise, there are three types of dryers:
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Aftercoolers. Often built into compressors, aftercoolers are heat exchangers that cool the compressed air. This lets the moisture in the air precipate out, helping to prevent condensate from entering the piping network.
Air Receivers. Also referred to as compressed air tanks, an air receiver will store the compressed air prior to it entering piping or other types of compressed air equipment.
Filters. Compressed air filters are necessary to ensure the quality of compressed air. They work to remove contaminants from the compressed air, including particles, water and oil vapor, and aerosols. There are a variety of filters available:
Oil-Water Separators. Oil-water separators capture the oil in a compressor's condensate to allow for proper disposal in a safe and environmentally-friendly way.
Drains. Automatic condensate drainage that collects at multiple points in the compressed air system, including the compressor aftercooler, filter drains, refrigerant dryer drains, the bottom of the air receiver, and other low points in the system after compression. In many cases, drains are electronically controlled, monitoring condensate build-up with liquid level sensors that detect and know when absolutely necessary to evacuate the condensate, minimizing spoilage of already compressed air.
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