Beyond the typical operations noted above are operations such as EDM machines, lube oil reservoirs and plastic molding/extruding machines, which also produce mists. With over 40 years of experience, Donaldson Torit® can provide collectors and guidance in collector selection. Refer to Donaldson’s Technical Reference Guide on Mist Collection of Metalworking Fluids for in depth discussion on mist collection for these operations.
Donaldson offers a full line of mist collectors from a single source machine mounted unit, all the way to a central mist collector. Donaldson Torit’s WSO Mist Collector with its unique Synteq™ XP filter media is an extremely versatile collector for all operations. It can provide a solution for water-soluble coolants, straight oils, or operations that have oily smoke. If your machining operations change, the only modification is a filter change.
In addition to the WSO, you can apply the Dryflo® (MMA, MMB) Mist Collector and Centrifugal Mist Collector as single source machine mounted collectors. Single source collectors offers a production facility a compact solution. Donaldson’s Mini-Mist and Modular MediaFilter™ provide excellent solutions for operations where mist and particulate fume are generated in a process, and for general plant ventilation the horizontal Modular MediaFilter is an option.
Some coolants can be corrosive to sealing materials and gasket material. Provide proper coolant data to your mist collector supplier to minimize any risk of coolant/oil not being compatible with the sealing and gasket materials used in the mist collector to avoid leaks.
The design and components of any duct system must take into account the amount of coolant or lubricant that may collect in the ducts prior to the mist collector. Sloping the ducts, and provide a means for coalesced coolants to exit the duct are just a couple of examples of actions to consider.
Mist collection hoods at the machine take-offs should be designed and located to limit mist collected to only airborne mist. Avoid directing excess coolant into a hood.
In order for a mist collector to properly function, always ensure a proper trap or storage device is used so collected coolant or lubricant can drain from the collector.
A monitoring HEPA or 95% DOP filter option is available. These after-filters commonly provide an indication of performance for the primary filter. These filters may also minimize the discharge of particulate smoke generated by metalworking operation.