Product Details: The Bendix AD-9® Air Dryer is the perfect solution to make sure your heavy duty trucks are Ready for the Road Ahead® by effectively removing moisture from compressed air through an internal desiccant to prevent system damage and ensure optimal performance. Once secured, the AD-9 ensures heavy duty trucks can rely upon clean, contaminant-free compressed air to actuate their braking systems. This air dryer is constructed with a carbon steel upper mount and safety valve that opens at 200 PSI. FleetPride is your First Click in Heavy Duty®.