Product lines
The right filter for every conceivable dedusting application

The fibre coating of needlona^® filter bags is applied to a strong supporting scrim, this makes the filter extremely compact, dimensional stable and mechanically resistant for long service lives under the toughest conditions. Depending on the flue gas cleaning method, the high-efficency filters media are enhanced with various finishes.

Particularly in industrial areas, fine dust can pose serious health risks, placing an enormous burden on both people and the environment. Lamination with a highly effective ePTFE membrane significantly increases filter media efficiency. Fine dust, measuring even in the submicron range, is thus already separated at the surface. Can be applied to needlona^® needle felt and glass fibre fabric.

Safety is our top priority. This is why BWF Envirotec pioneered then launched the first filter medium tested by DEKRA GmbH. ExCharge^® filter bags are manufactured from antistatic needlona^® filter media. Its resistance value is significantly less than 10⁶ Ohm (measured according to DIN 54345 Parts 1 and 5). High-quality stainless steel fibres in the supporting fabric ensure the filter bags' safe discharge.

ExCharge^® is available for polypropylene, polyacrylonitrile, polyester, m-aramide, polyimide, polyphenylene sulfide and polytetrafluoroethylene needle felts.

Producing foodstuffs entails strict hygiene rules. To ensure product purity, any filter bags used must be food safe. Our FoodTec^® product line has been specially developed for applications in the food industry, and tested and certified by an independent institute.

Our test results lie far below legally permitted limits, confirming the outstanding properties and food safety of FoodTec^® filter media. Compliance declarations are available for all PTFE, polyester and polypropylene FoodTec^® needle felts.

FoodTec^® filter bags reliably separate all particles, ensuring that the product remains pure throughout the production process.

In terms of employee health, one can't take shortcuts when it comes to dedusting the workplace. By using needlona^® filter media with a test certificate (PZ), the workplace itself can become a clean environment.

PZ test certificates from the Institute for Occupational Safety and Health (Berufsgenossenschaftlichen Institut für Arbeitssicherheit, IFA) are available for selected polyester needle felts.

In MPS^® filter media microfibres significantly increase the filter area of the needle felt, resulting in the greatest possible fibre surface. This means even the finest dusts are effectively separated.

Both reverse air and jet pulse filter systems are used in asphalt mixing plants. BWF Envirotec's AsphalTec^® filter media features a basis weight that is ideal for each of these systems. You can choose from weight classes beginning at 400 g/m² for reverse air and up to 550 g/m² for jet pulse filter systems.

Abrasive dust can do mechanical damage to the filter bag, shortening overall service life.
Fibre impregnations with silicone oil give needlona^® needle felt anti-adhesive properties. These properties reduce fibre wear from abrasive dusts many times over.

All needlona^® needle felts can be given an anti-adhesive finish. Depending upon the type and characteristics of the dust, we recommend Code9, Si or x-surf single fibre impregnation.

Agglomerating dusts can be found, among others, in combustion or drying processes.

CS18^® plus: A highly effective, concentrated application of PTFE polymers to the needle felt surface gives it excellent cleaning properties. This anti-adhesive surface coating reduces the adhesive forces acting between the filter medium and the dust cake, improving cleaning properties and creating low Δp behaviour in the filter system.

Especially with agglomerating dusts, additional calendering and/or a smoothed surface makes for excellent dust cleaning characteristics. Glaze thus leads to reduced pressure loss.

Especially during metallurgical processes hot, partially glowing particles may come into contact with the filter bag. Our FireGuard and BlockGuard product series protect against these forms of dust.

FireGuard is a high-tech p-aramid surface finish that increases resistance to flying sparks. FireGuard also offers excellent resistance to abrasion and mechanical wear.

BlockGuard consists of a layer of spark resistant Preox fibres. It is mainly used on polyester needle felt, and presents a solution for occasional sparks that may occur in the raw gas flow of the filter system.

Needle felts can also be processed with a surface finish from our CS product line that protects against acidic and alkaline dusts.

Oil- and water-repellent impregnation provides additional protection against acids. CS29^® is a finish that provides excellent protection for the needle felt against acids, alkalis and hydrolysis.
What's more, CS29^® features outstanding oil and water repellency.

CS52 is a protective finish against acid, alkali and hydrolysis for m-aramid filter media that repels dust, oil and water. An additional PTFE-based anti-adhesive finish improves dust separation properties.

CS17^® is an oil- and water-repellent fibre impregnation that is based on fluorocarbon resin. It reduces the level of moisture that penetrates the needle felt, thus reducing the risk of excessive dust deposits and caking.

CS30 PTFE fibre impregnation is used to filter fine, well-adhering dusts. Its PTFE properties make it both extremely durable and chemically resistant. CS31 is a combination of CS30 with a CS17^® finish. It is also water- and oil-repellent. It also protects the needle felt from moisture and condensation.