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Bendix® AD-1™ and AD-2™ Air Dryers
FIGURE 1
The air dryer collects and removes moisture and contaminants before the air reaches the first reservoir. It is distinctly different than a reservoir drain valve or aftercooler in that it provides “dry air” for the air brake system. The daily draining of the system’s reservoirs is no longer necessary, thus reducing maintenance considerably when compared to an air brake system without an air dryer.
In a system without an air dryer, the life of air brake components is substantially reduced because of contact with water and oil in the system and since the air dryer removes water and oil in vapor form, life of the component devices is substantially increased when the air dryer is used.
SD-08-2403
The air dryer can be used on most highway vehicles where normal compressor loaded time is 90 seconds or less and unloaded time is 30 seconds or more. If the compressor remains loaded for long periods of time, such as on a transit bus, certain changes in the purge volume of the dryer must be made. For more information regarding increase of the purge volume, contact our Engineering Department, in Elyria, Ohio.
The air dryer is installed in the discharge line between the compressor and the first reservoir. The unit must be mounted vertically and mounting brackets are provided and can be adjusted to meet installation requirements.
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