Edge type filter elements are made up of special paper discs under end pressure. Oil passes through the infinitesimal interstices between the discs, leaving solid impurities at the paper edges. Non hygroscopic graded filters can be used in place of edge filters, but they are much costlier.
For reducing acidity, absorption device using activated alumina should be incorporated in the operating cycle.
Hot Oil Circulation Process
|Hot Oil Circulation process|
- Temperature indicators for oil
- Vacuum gauges
- Pressure gauges
- Moisture content meters (if necessary)
- Gas content meters (if necessary)
- Annunciation -Visual and audible alarm for indicating mal-operations.