Machinery Lubrication

Machinery Lubrication May - June 2018

Machinery Lubrication magazine published by Noria Corporation

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Page 41 of 80

www . | May - June 2018 | 37 How to Manage the Filter Filter ma na gement shou ld include a combination of activities, beginning with the selection of filters for the system's needs. If water is a common uncontrollable contami- nant, then filters specifically designed to help remove large amounts of water or a separate water-removal device may be necessary. Secondly, being aware of and controlling the ingression points for all types of contaminants will increase not only the filter life but also the life of the oil and machine. Contamination control is all about exclusion and remova l. Removal by means of a filter may be inevitable to some degree, but investing in contaminant exclusion only costs one-tenth of what it will cost after contamination enters the system over the machine's lifetime. Also, solid contaminants aren't the only types of contamination that should be considered. Moisture is the second most destructive contam- inant and is often ignored. As with any filtration, a differ- ential pressure gauge should be installed to identify a change in pressure between the inlet and outlet sides of the filter's housing. is will give an indication of the saturation level of the filter media. If the correct filter has been selected, the differen- tial pressure will gradually increase over several weeks or a month. Of course, a drastic spike can occur at any time as a result of an unexpected surge of particles or saturation of the media by water or other insoluble products. at being the case, never rely solely on historical data to deter- mine how often to change a filter, especially for critical equipment. Just like every inspection device installed on equipment, the differential pres- sure gauge should be inspected frequently and marked so mainte- nance and operations personnel can easily recognize an issue and report it immediately. ML About the Author Bennett Fitch is the director of product development and services for Noria Corporation. He is a mechanical engineer who holds a Machine Lubricant Analyst (MLA) Level III certification and a Machine Lubrication Technician (MLT) Level II certification through the International Council for Machinery Lubrication (ICML). Contact Bennett at to learn how Noria can help you better control contamination in the critical machines at your plant. ML

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