Candle filter is basically a pressure filter consisting of a number of Candles arranged vertically in a pressure vessel. About Candle, each consists of six nos. of slotted/perforated tubes around a central blind wall tube & this is covered with replaceable filter cloth. This special contour of the candle ensures excellent backwashing. Slurry is fed to the filter at the bottom and the same gets filtered through the filter element of each candle under pressure & leaves out through each sub-header before joining the main header outside. At the end of the filtration, once the feed is stopped, vessel hold up volume can be further filtered by pressurization of the filter vessel. This will minimize the heel volume that shall be drained back to the feed vessel. For removal of cake, compressed air/nitrogen or any compatible liquid is given in the reverse direction.