Haldex designs tandem air drying system for transit use

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Haldex Commercial Vehicle Systems on Monday, July 20, announced a design for Novabus that incorporates the Dryest Air Drying system working in parallel with a condenser and external governor. The company says the system consists of two desiccant-type air dryers working in tandem to remove humidity, dirt particles and oil from the compressed air system, reducing the risks of freezing and corroding air components.

Haldex says the tandem design meets or exceeds 2010 cfm capacity standards up to 80 cfm for high-capacity compressors; it allows the compressor to operate cooler without back pressure and allows the air system in the vehicle to fill quickly and stay at higher air pressure levels for longer periods.

The tandem air dryers have built-in drain ports with tubing to help direct fluids away from the operating environment, according to the company; desiccant life is expected to last from two to three years between cartridge changes. Haldex says the system purges only when the compressor shuts off, saving air and energy.