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Centrifugal Separator Mist Eliminators

Centrifugal Oil Mist Control Systems Guide

Centrifugal Oil Mist Control Systems, remove mist and provide fluid metalworking recycling.  Commonly known as centrifugal separators, the apparatus consists of a spinning chamber or drum that flings heavy droplets of oil into an outer collection chamber, which in turn drains oil back to the machine via hoses.  Centrifugal mist eliminators are designed to filter oil, synthetic and water based metal working fluids.  The centrifugal process effectiveness is limited to fluids only.  Smoke and solid particulate contaminants will either pass through or impede the operation of the centrifugal mist eliminator. Read more

Product	Pros	Considerations	Features	Application	MSRP
Aercology E-Type Mist Eliminator	• Small size. • No need to clean disposable filter liners.	• Requires frequent maintenance to avoid downtime. • Vibration from spinning drum may reduce machine tool precision. • Requires periodic filter liner replacement and disposal.	• 100-900 CFM • Centrifugal separator • Optional HEPA • Coated perforated rotating drum • Collection chamber • Drain system	• direct machine mount source capture w/ducting • smoke • clean synthetic mist • clean oil mist • not for mist with heavy particulate	Not Published Read more about this oil mist eliminator at Aercology's web site.
Royal FilterMist Mist Eliminator	• Very small - takes almost no space • Fluid savings: drains coolant back into machine. • Versatile mounting options.	• Requires electrician to install. • Several parts require frequent maintenance. • Requires periodic replacement of disposable drum pads. • Motor starter not included. • Vibration from spinning drum may reduce machine tool precision.	• 275-1200 CFM • centrifugal separator • Various pre & post filters • Optional noise attenuator • Various mounting options • Optional maintenance kit	• direct mount to machine or ducted capture • coolant mist • dry smoke	$1,380-$3,240 Learn more on this mist eliminator at Royal's web site.
Royal Stainless Steel FilterMist Mist Eliminator	• Very small - takes almost no space. • Fluid savings: drains coolant back into machine. • Versatile mounting options. • Stainless steel parts resist corrosion.	• Requires electrician to install. • Several parts require frequent maintenance. • Requires periodic replacement of disposable drum pads. • Motor starter not included. • Vibration from spinning drum may reduce machine tool precision.	• 275-1200 CFM • centrifugal separator • Various pre & post filters • Optional noise attenuator • Various mounting options • Optional maintenance kit	• direct mount to machine or ducted capture • coolant mist • dry smoke • aqueous parts washers with caustic soap • food processing oil spray	$2,750-$3,850 Research more on this mist eliminator at Royal's web site.

Centrifugal Separator Mist Eliminators Product Review

by Mark Schreiber

Centrifugal oil mist eliminators spin a drum at high speeds around 3400 RPMs in order to pull in contaminated air.  These large spinning parts cause noise and vibration.  To prevent vibration or shaking from affecting the quality of parts being machined, the centrifugal mist separator should be isolated from the machine via ducting.  Once oil mist and smoke is drawn inside its spinning drum, liquid droplets are thrown to the outer wall and collected in another chamber.  Fine mist and oil smoke passes through the unit.  A media type HEPA after filter is needed to collect smoke and fine mist.  There is also a disposable media filter inside the collection chamber.  Both media filters cost at least several hundred dollars and typically need to be replaced 2-3 times per year.

Unlike other machine mount technologies, centrifugal coolant mist eliminators require an electrician to hard wire power and controls. Other machine mount mist eliminators, like the MistBuster, use a standard electrical plug, that you simply plug into a standard outlet.  The centrifugal mist eliminators in the comparison chart above always require some sort of mounting hardware. On the other hand, the MistBuster, for example, has an inlet opening that is 16” x 9” which can be set over any hole in the top of the machine tool that is 6” in diameter.  Anyone with shop knowledge can cut a hole and bolt on a Mistbuster.

If you are planning to use a centrifugal mist eliminator, you will need to gear up for a rigorous maintenance schedule.  Internal contamination build up is a big problem for centrifugal oil mist separators.  They require periodic drum cleaning, annual or monthly inspections (depending on use) and usually a complete rebuild every 3 to 5 years, including over 30 wear items.