The Candle Filters are, as all pressure filters, operating on a batch cycle. Candle Filters is the cylindrical shape of the elements that retain the formed cake. Candle Filters are very well suited for handling flammable, toxic and corrosive materials since they are enclosed and designed for hazardous environments when high pressure and safe operation are required. Candle Filters are available in various sizes. Candle Filter consists of three major components:

The vessel
The filtering elements
The cake discharge mechanism

Backwash cycle is for remove the cake

Selection Criteria

Candle Filters are best selected:

When minimum floor space.
When the liquids are volatile and may not be subjected to vacuum.
When there is a risk of environmental hazard
Higher yield & catalyst recovery.
When the cake may be discharged either dry or as a thickened slurry.