Candle filter bags are a type of filtration media used in industrial applications, typically in liquid filtration systems. They are called “candle filters” because of their long, cylindrical shape, resembling candles. These bags are used in pressure or vacuum filtration systems where high-efficiency filtration is required, often in processes such as chemical, pharmaceutical, food, beverage, or water treatment industries. Candle filter bags can be designed as non-woven and woven types. Due to regeneration issues, woven filter bags are more commonly used.
- Material: PP, PE, PA, PTFE, PPS, PEEK.
- Weaving Methods: Plain, Twill, Satin.
- Bag Diameter: φ90, φ80, φ75, φ120.
Description
Candle Filter Working Principle
Candle Filters are named based on their shape. These filter elements are usually hollow tubes with a cap on the bottom and a threaded connector on top that attaches to a header. The outer face of the tube is usually made of punch plate, expanded metal, sintered metal, or porous ceramic to provide support for the filter media.
- Feed to the filter is always positioned at the lower portion of the vessel to allow up-flow of the incoming slurry.
- Desired for maintaining fast setting solids in a homogeneous suspension and thus ensuring that uniform cakes are formed.
- An uneven cake thickness that tapers up interferes with the efficiency of cake washing and reduces the effective volume of the cake that accumulates on the filtering elements.
- To control the up-flow velocity an overflow connection is positioned on the dished top and the selected pump must be sized to deliver a higher rate than required for the calculated material balance.
Product Features
- Candle filter bags can be used repeatedly. When the filter material is damaged or too much dirt accumulates, they need to be replaced.
- Candle filter bags adopt a closed design with no seams, impurities are not easy to leak out, avoiding pollution to the environment and human body, and have a long service life.
Technical Parameter of Candle Filter Bags
Candle Filter fabric media is woven from high-quality polypropylene, nylon, PTFE, polyester and cotton textiles into various styles, with a filtration range from 1 to 900 microns. Fabric media also allows for higher flow rates.
| Product Code | Material | Yarn Type | Weight (g/m²) | Thickness (mm) | Air Permeability
(L/m²/S @125pa) |
| ES-PCD18PB | PP | Multi/Multi | 390 | 0.76 | 22 |
| ES-PCD03P | PP | Multi/Multi | 430 | 0.71 | 3 |
| ES-TCD240DFB | PE | Multi/Multi | 225 | 0.3 | 289 |
| ES-PPSCD20T | PPS | Multi/Multi | 420 | 0.85 | 25 |
| ES-PEEK | PEEK | Multi/Multi | 430 | 0.61 | 12 |
Application Fields
- Pharmaceutical Filters.
- Fine Chemistry Filters.
- Food Industry Filters.
- Fuel and Oil Additive Filters.
- Hazardous Materials Filters.
- Precious Metal and other Catalyst Recovery Filters.
