Bendix Commercial Vehicle Systems' AD-IS air dryer module has been named as standard equipment on all Kenworth trucks offering a standard air dryer effective Dec 29, 2003.

The AD-IS dryer module incorporates four pressure protection valves in the air dryer module instead of being remotely mounted on the system reservoirs. This configuration facilitates direct plumbing and, as a result, direct charging of the vehicle accessories from the air dryer.

Because the AD-IS dryer has a self-contained purge volume, the air system reservoirs maintain constant pressure during the purge cycle and are fully dedicated to air system operations. With system air pressure of up to 135 psi, the AD-IS module provides air pressure reserved for extra braking.

The AD-IS module can decrease the number of major components by as much as 56%, reduce pneumatic line count by 44%, and minimize total pneumatic connections by 50% when compared with a typical charging system.

AD-IS's modular design employs a spin-on desiccant cartridge that can be changed in less than 10 minutes. The air dryer is warranted for three years or 350,000 miles.