The 469-200 Series Transit Spin-on Air Dryer is a state-of-the-art compressed air filtering/drying assembly. This drying system is a combination of some of the most advanced adsorption technology to date. The 469-200 Air Dryer offers spin-on desiccant cartridges for ease of maintenance. Designed by the Graham-White Engineering Team, with input from our customers, this drying system will provide most rail transit industry applications with compressed air that is free of oil, dirt contamination and moisture.