Stage 1 - Oil Coalescer Filters

The oil removal 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 fibres. The oil droplets continue to collide with the fibre and so the oil droplet gains in mass. As the oil drop becomes bigger, it becomes heavy enough to fall against the airflow to the base of the ScandMist unit, where it can be collected or drained straight back to the machine tool sump.

Stage 2 - Oil Removal Filters

The “scrubbed” air is then passed through a highly efficient coalescer at stage two where the coalescing process is repeated. After this second filtration stage, the air is on average 95-98% free from oil mist.

Stage 3 - HEPA Filtration

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% efficiency at 0.3 µm. This means that in a workshop environment, effectively all hazardous particles are trapped ensuring only clinically clean air is returned to the workshop.