The QBA Series Air Dryer truly live up to the Quality Brake Air name. The QBA Air Dryers are equipped to fulfill the critical demands of the stop and go, high air usage, "Severe-Duty" vehicles. Unlike single tower devices, there are no restrictions as to how long a compressor can pump and no minimum compressor unload time is required. The QBA Series Air Dryers combine multiple high efficiency filtration components with twin tower drying technology in one easy-to-install, compact package. When properly applied, installed and with minimal maintenance, the QBA Series will literally transform your operation. Severe-Duty vehicles that have a history of winter brake air line freezing, heavy oil sludge, carbon, water and dirt can now enjoy the trouble free benefits of "Quality Brake Air".  Chose from the QBA15 for lower capacity compressor applications or QBA60 for higher capacity compressor applications.  Consult Graham White for specific applications.