In some applications, compressed air lines may be exposed to temperature below freezing levels. In these applications, the pressure dew point must be reduced to below the levels that a refrigerant air dryer can achieve, in order to prevent ice from forming in the compressed air lines. There are many applications where compressed air may come into contact with chemicals, food products or other products in which water vapor in the compressed air may interact negatively in the process. These applications are referred to as “process” applications, and it is often necessary to remove almost all of the water vapor… Read the rest
There are several types of compressed air dryers on the market, and many different applications for drying compressed air. Many industrial and commercial applications for compressed air will be for hand tools or the operation of pneumatic cylinders and valves in an indoor applications. These are referred to as “power” applications. For the most part, these applications require the air to be free of condensate (free liquid), which will impede the tool’s performance and cause corrosion, shortening the life of the tool. Refrigerant air dryers are usually selected for these applications. They remove water vapor from the compressed air by … Read the rest
In applying your regenerative blower, it is therefore necessary to know the operating conditions for the blower. Most blowers (including APPL’s standard models), include motor winding embedded thermistors for protection of the motor. On small single phase units, these thermistor leads (in the motor terminal box) should be wired in series with the 115V hot lead supplied to the blower. On larger single phase units (over 15 amp service) and on 3 phase models, the thermistors may be used for pilot duty service only. With these voltages, a motor starter must be used and the thermistor should be… Read the rest
Several descriptive names have been used for “regenerative” blowers by different manufacturers, which may include “side channel”, “vortex”, or “ring compressors”. These are basic descriptions of the blowers based on the dynamic motion of the air stream inside the blower housing as it turns in a spiraling effect. As the impeller blades pass the inlet port in the blower, a low pressure area is generated that draws air/gas into the voids between the impeller blades. The air captured in these voids is thrown by centrifugal force from the base of the impeller to the housing perimeter, then is returned by… Read the rest
A variety of air compressors are available in the market of which oil-less air compressors are used to provide oil-free compressed air. They are used in critical operations, where products or processes could become contaminated if subjected to small amounts of oil. Contamination may result in costly scrapping of product and/or production downtime to clean or purify the system. Oil-less compressors may also be used with additional purifying filtration and safety controls to produce air for breathing applications in industry and medical systems.