The MicroTech Drum Filter (MDF) is a permanently-submerged media vacuum filter designed for cleaning many types of coolants used in grinding & machining. The MDF is a two-stage filter system combining a solids settling tank and a cellulose depth filter into one system. The heart of the system is the MicroTech Drum Filter element. Its unique design provides exceptional filtration performance and reliability. The Microtech Drum Filter has been designed to operate between a choice of three grades of cellulose pre-coat – 1, 5, or 10 micron filtration. For course grinding or machining projects requiring only 20/30 microns the filter can be used without cellulose as a media-free “self-coat” filter.