Delivering performance proven solutions for buses QBA40 Severe Duty Bus Air Dryer Features patented multi-stage filtration combined with advanced twin tower drying technology Engineered for optimal trouble-free performance in severe duty applications, Graham-White QBA Series Sludgebraker® dryers are designed for any bus, truck, or off-road vehicle equipped with a pneumatic brake system that requires an air dryer to maintain quality brake air. • Filters heavy sludge oil, carbon, water and dirt contamination The new QBA40 model features health monitoring and optional CAN-Bus communication to provide real-time dryer performance and outlet air quality. Service feedback is based on actual dryer usage. Easy to install and maintain, desiccant cartridges and filter can be serviced in minutes. • Eliminates liquid water – prevents airline freezing Quality Brake Air Reduces Downtime Continuous health monitoring, reports operational issues Condition-based maintenance, LED signals required filter and desiccant cartridge service Self-test push button to verify dryer operation Digital Humidity Sensor monitors and reports air quality Option for CAN-Bus ready for easy access to dryer performance Performance and faults are logged and files can be down

Spin-on threaded disposable desiccant canisters Integrated coalescing filter Status and Fault Indicator Field serviceable Digital Humidity Sensor Outlet check valve Condition-based maintenance Microprocessor based controls Continuously monitors all sensors Specifications TWIN TOWER PRESSURE SWING REGENERATION Desiccant Material: Max Inlet Flow Rate: 40 SCFM nominal / 1133 l/min Operating Voltage: Coalescing Filter Rating: Current Draw: Current Draw w/Heater: Weight (with, w/o Bracket): Annual filter element changes. Three (3) year desiccant change. Unloader/drain valve/turbo CAN-Bus communication...