System Removes Oil Mist and Smoke from Air

Designed to extract oil smoke and mist from the environment, the Clean Air America ScandMist oil mist removal system uses a three-stage process for most applications where the first two stages are designed specifically for emulsion or neat oil, and the third filter is a H13 HEPA (99.995 percent).

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Designed to extract oil smoke and mist from the environment, the Clean Air America ScandMist oil mist removal system uses a three-stage process for most applications where the first two stages are designed specifically for emulsion or neat oil, and the third filter is a H13 HEPA (99.995 percent).

The first stage oil coalescer filters operate by collecting the oil or coolant and allowing it to drain to the base of the ScandMist unit. The filters do not absorb the oil, but rather coalesce it until it is heavy enough to drain. Contaminated air passes through the filter media. As it does so, the oil particles are attracted to the oleophobic fibers. The oil droplets continue to collide with the fiber, causing the oil droplets to gain in mass. As the oil drop becomes bigger, it becomes heavy enough to fall against the airflow to the base of the unit, where it can be collected or drained straight back to the machine tool sump.

In stage 2, the “scrubbed” air is then passed through a highly efficient coalescer where the coalescing process is repeated. After this second filtration stage, the air is on average 95-98 percent free from oil mist, the company says.

The third filtration stage is designed to completely clean the remaining air to a standard far higher than the surrounding ambient air. Using a HEPA filter, this final stage ensures that fine, sub-micron particles (trace oil, smoke, bacteria, pollen and spores) are trapped and not allowed to return to the workshop. HEPA filters (grade H13 EN1822) operate at 99.95 percent efficiency at 0.3 micron. This means that in a workshop environment, effectively all hazardous particles are trapped, ensuring only clinically clean air is returned to the workshop.

Oil extracted from the air can be recovered and recycled. In most cases, the unit returns the filtered air directly to the shop, reducing energy costs and making for more balanced ventilation, according to Clean Air America.