The Bendix+ AD-IS+ -Integrated Solution- air dryer and reservoir system and the Bendix+ AD-IS+ PuraGuard+ oil coalescing air dryer and reservoir system collect and remove air system contaminants in solid, liquid, and aerosol form before they enter the brake system As a module, they provide heavy vehicles with an integrated vehicle air dryer, purge reservoir, governor, and a number of the charging valve components in a complete assembly These components have been designed as an integrated air supply system