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Sep 1, 2003 12:00 PM

Donaldson Co Inc's Diesel Oxidation Catalyst (DOC) muffler and Spiracle closed crankcase ventilation (CCV) filtration system enable users to retrofit diesel engines with a set of devices that reduce diesel engine emissions from tailpipes and engine crankcase vents of medium and heavy-duty trucks and school buses.

The muffler and Spiracle system can be used in a variety of engines, with a wide range of operating conditions, and they address both exhaust and crankcase emissions. The combination of these two devices reduces engine particulate matter emissions by more than 25%, the company said.

Spiracle systems keep the crankcase clean through a two-stage filtration process. The unit has a replaceable filter, a pressure relief valve to prevent pressure build-up in the crankcase, a bottom-drain oil sump connection to return coalesced oil to the engine, and a top load design for serviceability. The Spiracle filter change-out is designed to coincide with the engine manufacturer's oil change interval requirements.

The DOC/Spiracle system meets the United States Environmental Protection Agency's (EPA) Voluntary Retrofit Program warranty requirements and has received the California EPA Air Resources Board Level 1 verification.

For additional information, contact Donaldson, 1400 W 94th St, Bloomington MN 55431-2370.