BWF Envirotec Filter Media & Technical Specifications
Your benefits at a glance
- Meet strict emission limits
- High separation efficiency
- Low residual dust emission
- High abrasion resistance
- Good chemical resistance
- Filter even the finest dust particles
- Easy cleaning
- Low pressure loss
Resistance of synthetic fiber to the influence of chemical and temperature
Fibre types
BWF Envirotec Designation
Temperature* Contin. °C
Temperature* Peak °C
Resistance to hydrolysis
Resistance to acids
Resistance to alkalis**
Resistance to oxidation
Polypropylene
Polyacrylonitrile homopolymer
Polyester
Polyphenylensulfide
m-Aramide
Polyimide
Polytetrafluoroethylene
Fibreglass
PP
DT
PE
PPS
NO
PI/P84® YI
PTFE
GL
90
125
150
190
200
240
250
260
95
140
150
200
220
260
280
288
excellent
good
moderate
excellent
moderate
good
excellent
good
excellent
good
good
excellent
moderate
moderate
excellent
moderate
excellent
good
moderate
excellent
moderate
moderate
excellent
moderate
moderate
good
good
moderate
good
good
excellent
excellent
Application industries and working conditions of synthetic fiber
Fibre types
BWF Code
Application
Polypropylene
Polyacrylonitrile homopolymer
Polyester
Polyphenylensulfide
m-Aramide
Polyimide
Polytetrafluoroethylene
Fibreglass
PP
DT
PE
PPS
NO
PI/P84® YI
PTFE
GL
Applicable to food, flour, sugar, fertilizer, electroplating, and pesticide industries.
Applicable to detergent, waste incineration, asphalt, spray dryer, coal mill and power plant (desulfurization part) industries.
Applicable to mine, limestone, cement, iron and steel industries, alumina delivery, electrolytic aluminium, non-ferrous metal production, wood processing, food processing and pharmacy industry.
Applicable to the working conditions with low-oxidation gas from coal-fired boiler, waste incineration, metal smelting, and chemical industries.
Applicable to asphalt, non-ferrous metal production, ceramic, glass industries, clinker cooler in cement factories, and blast furnace in steel factories.
Applicable to the working conditions with corrosive gas, such as chemical, metal smelting, waste incineration industries, cement kiln and coal-fired boiler.
Applicable to the working condition with high-corrosive gas and high temperature, such as chemical industry, coal-fired boiler, waste incineration industry and non-ferrous metal production.
Economic high temperature filter medium. Applicable to cement kiln filter, power plants, municipal waste incinerators.
Glaze. The smoothed surface for agglomerating dusts.
Glaze – for excellent elimination of the filter cake
Filter media in industrial filtration are
individually designed to suit the operating
conditions in the filter house. Selection of
the correct needle felt and surface coating is
the most important criterion in this case.
The surface coating protects the needle felt
effectively against harmful influences and has
a markedly positive effect on the service life,
filter cake formation and cleaning.
Glaze is the right choice for optimum elimination of agglomerating dusts.
Owing to an additionally smoothed surface
for needle felts, particularly in case of
agglomerating dusts, Glaze offers excellent
elimination of the filter cake.
Agglomerating dusts occur for example in
combustion or drying processes.
Glaze can be combined with CS17® as an
oil and water-repellent finish and with CS31
as PTFE fibre impregnation
Glaze at a glance
- Improved elimination of the filter cake
- Less pressure loss
- Extended service lives of the filter bags
Glaze – applications
- Chemical and pharmaceutical industry
- Food industry
- Cement industry
- Power plants
- Thermal waste treatment
- Clean-in-Place plants
Delivery range
Product
PP
DT
PE
PPS
NO
PI/P84® YI
PTFE
GL
Glaze
*
*
*
*
-
-
-
-
* Available / - N.A.
ExCharge. The antistatic filter bag for optimum explosion protection
Avoiding dust explosions is a major challenge in industrial production.
ExCharge® achieves resistance values of significantly less than 106 ohms, measured according to DIN 54345 (Part 1 and Part 5), and thereby meets the electrostatic requirements for conductive filter media. Provided ExCharge® filter bags are permanetly grounded, from an electrostatic point of view there are no concerns about the use in all areas at risk of dust explosion (zones 20, 21, 22) as well as in all areas at risk of gas explosion (zones 0,1, 2).
This property can be used in the risk assessment of equipment subject to Directive 2014/34/EU (“ATEX directive”), where ExCharge® filter bags shall be installed
ExCharge® AT A GLANCE
- Optimum dissipation of electrostatic charges
- Permanently antistatic behaviour due to high-quality
stainless steel fibres (1.4404/AISI 316L) in the needle felt - When produced with ExCharge® yarn, then all properties
also apply to ExCharge® filter bags - Tested by DEKRA
ExCharge®-APPLICATIONS
- In potentially explosive atmospheres
- For highly chargeable/charged dusts
Delivery range
Product
PP
DT
PE
PPS
NO
PI/P84® YI
PTFE
GL
ExCharge
*
*
*
*
*
*
*
-
* Available / - N.A.
MPS®. Filter media for fine dust filtration.
MPS® – increased fibre surface by microfibers
Airborne fine dust is extremely hazardous to health. Particularly in industrial zones it represents an enormous burden on the environment. Filter media from BWF Envirotec also ensure clean air in this case too. We have developed our MPS®-filter media specifically for filtration of very fine dusts, such as those occurring in coal-fired power stations, biomass power plants and in non-ferrous metal and steel production.
Microfibres result in a several-fold increase in the fibre surface of the filter medium, thereby providing the greatest possible filtration surface with a separating action with minute pores on which even minute dusts are separated.
MPS®-filter media thus ensure extremely low emission values with simultaneously reduced cleaning intervals, compressed air consumption and energy.
MPS® at a glance
- Improved elimination of the filter cake
- Extremely low emission values
- Extended service lives of the filter bags as a results of reduced elimination intervals
- Favourable operating costs through reduced compressed air and energy consumption
MPS® – applications
- Coal-fired power stations
- Biomass power plants
- Non-ferrous metal and steel production
- Thermal waste treatment
Delivery range
Product
PP
DT
PE
PPS
NO
PI/P84® YI
PTFE
GL
MPS®
*
*
*
*
*
*
*
-
* Available / - N.A.
needlona® filter bags produced of needle felt
of all types of conventional polymer fibres
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.
Advantages of needlona® at a glance
- Improved eliminiation of the filter cake
- Constant differential pressure
- Constant gas flow rate
- Long service life and high productivity
needlona® – applications
- needlona® filter bags from BWF Envirotec are used in many areas, such as the cement, waste, wood, chemical, pharmaceutical, food, metal and plastics industries or in power stations.
Delivery range
Product
PP
DT
PE
PPS
NO
PI/P84® YI
PTFE
GL
needlona®
*
*
*
*
*
*
*
-
* Available / - N.A.
PM-Tec® filter bags with ePTFE membrane
Fine dust doesn't stand a chance!
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.
Advantages of PM-Tec® at a glance
- Even the finest dust particles are separated beginning at the surface
- Lowest emission levels, with zero emission a near possibility
- No dust penetration into the carrier material
- Excellent cleaning properties due to smooth, anti-adhesive surface
- Constant differential pressure
- Constant gas flow rate
- Long service life and high productivity
PM-Tec® – applications
- PM-Tec® filter bags from BWF Envirotec are used in many areas, such as the cement, waste, chemical, pharmaceutical, food, metal and plastics industries or in power stations.