Pressure Tube/Candle Filters
National Filter Media offers a variety of Pressure Tube Candle Filters ensuring we can help you find the candle filter that is perfect for your application.
Pressure Tube Candle Filters are liquid-solid pressure tube filters that use groups of columnar filter elements sealed within a pressure vessel to produce a cake with dry solids and filtrate with high clarity. The number of candle elements depends on the filtration area of the Pressure Tube Candle Filter. During operation, a slurry enters the candle elements through the filter bag. The cake sits on the bag and filtrate is discharged through the central tube element. After the filtration cycle, the cake is discharged by back washing with compressed air or liquid stroke. Containment of the filtration process means these filters are ideal for processing solvents, concentrated acids and other toxic products.
Pressure Tube Candle filters are well suited for applications that require efficient low moisture cake filtration or a high degree of polishing. These filters can also be used for thickening to produce a concentrated flowable slurry by partial removal of the liquid phase as filtrate. Additionally, Pressure Tube Candle Filters are able to operate on very short cycle times, taking advantage of the high filtration rates while the cakes are still thin.
- Offer a smaller footprint than pressure leaf filters
- Very high filtration rates
- Wet cake or dry cake discharge
- Virtually no maintenance or maintenance costs
- Back washable
- Optional use as a continuous thickener
- Automatic discharge of cake by blow back, using low air volumes
- Filtration area increases by 50 percent during the cycles
- Can be automated
- Contained filtration
- Polishing liquids
- Fine chemicals
- Agricultural chemical
- Pulp and paper
- Precious metal catalysts
- Activated carbon
- Edible oils
- Filtrate and concentrate polishing process lines handling titanium dioxide
- Flue gas
- Brine clarification
- Red mud
- China clay
With these many advantages, Pressure Tube Candle filters are ideal for a wide range of applications. Notably, containment of the filtration process means these filters are ideal for processing solvents, concentrated acids and other toxic products.
National Filter Media offers Pressure Tube Candle Filters with an available filtration area of up to 200m². The Candle Filter units are primarily made of stainless steel; however, vessels are also available in titanium and high nickel alloys. Vessels are lined with hard rubber, PVDF or Halar coating. From the pressure tube candle filter unit, to the replacement parts including candle filter bags and candle filter elements, National Filter Media has everything you need to operate a pressure tube candle filter at your facility. Call us today to learn more about our Pressure Tube Candle Filters and replacement parts.
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