Paper band filters are basically gravity filters. These are very widely used for filtration of fluid used in grinding machines. Being a gravity filter it needs a large filtration area as compared to pressure & vacuum filters.

Paper Band Filter

As mentioned above these filters are gravity filters. The filter paper is laid on the conveyor. Fluid that is coming from machine is dropped on the filter paper. The sludge mixed in the fluid starts accumulating on the filter paper & creates resistance for fluid flow through the filter paper. This results in accumulating fluid on filter paper & level increases on the filter paper. This level senses the sensor to index the filter paper. Geared drive helps in indexing the filter paper with slow speed & avoid wastage of paper. This comes in various sizes to suit the different flow rates.

Compact Band Filters

These are new generation gravity filters. To increase the filtration level, space required by traditional paper band filters, paper consumption the Compact band filters have been developed. In this filter we get more static head as compared to paper band filters because of it's peculiar design that helps in finer filtration, reducing paper consumption.

These are mainly gravity filters.

Drum filters are mainly used for aluminum chips that take more time to settle down. In normal chip conveyor aluminum chips can overflow along with fluid in to the clean tank. To handle this problem mesh type drum filters have been developed. In mesh drum filters; the drum is rotated along with the conveyor. Drum is covered with fine filter mesh (Stainless steel OR Nylon). The drum rotates along with the conveyor. Fine particles sticks to the filter media. These particles are back washed with the help of pressurized fluid to avoid clogging of the filter media. It comes in a wide range of flow rates.