What is the purpose of an alcohol evaporator on an air brake system, and does it eliminate the need for daily air tank drainage?

Question

Accepted Answer

It adds alcohol to the air system to reduce the risk of ice forming in valves and other parts during cold weather, but daily tank drainage is still needed unless the system has automatic drain valves

Answer

It permanently removes all water from the compressed air, making daily tank draining completely unnecessary on any vehicle

Answer

It is a legally required component on every air-brake vehicle regardless of climate, replacing the air compressor governor

Answer

It is used to clean oil out of the brake shoes and linings, not the air supply