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Bag Filter Fan

Pulls the process gas through the filter bags and discharges the cleaned gas to the stack. Works on the clean side, so the blade can be chosen for efficiency, with the filter pressure drop added to the duty.

Selection

Product	Centrifugal Fans
Blade types selected	Backward curved and radial tipped
Where it is used	All industries: carbon black, tobacco, boiler, fertilizer, activated carbon, metallurgical
Industries

Impeller type usually selected — Impeller form usually selected for this duty. See Centrifugal Fans for the full set.

Range

0.3 to 120 m³/sAir or gas volume, single fan

25 to 3120 mmWCStatic pressure, single stage

Six blade formsSelected for temperature, medium and dust load

The inlet, impeller, volute, shaft and drive accessories work as one assembly. A change in duct resistance shifts the operating point on the fan curve, so a selected duty must state flow, pressure, gas density and speed together. The largest flow and pressure values in the range above are not a simultaneous guaranteed operating point.

In each industry

By process

The same duty, selected for the gas of each process.

Bagasse Fired BoilersRice Husk Fired BoilersAFBC BoilersCFBC BoilersPulverised Coal Fired BoilersWaste Heat Recovery BoilersBiomass Fired BoilersCement Preheater KilnsVertical Roller Raw MillsBall Mill Raw GrindingCement Grinding MillsClinker Grate CoolersCement Plant Coal MillsCement Packing and DispatchRotary Lime KilnsVertical Shaft Lime KilnsGypsum Calcining PlantsSponge Iron Rotary KilnsSinter PlantsCoke Oven BatteriesElectric Arc Furnace SteelmakingInduction Furnace Melt ShopsLadle Furnaces and Secondary MetallurgyFerro Alloy Submerged Arc FurnacesAluminium Smelters and Cast HousesCopper and Zinc SmeltingIron and Non-ferrous FoundriesGlass Melting FurnacesCeramic Tunnel and Roller KilnsCeramic Body Spray DryersWaste IncineratorsFertilizer Granulation PlantsFertilizer Rotary Dryers and CoolersFood and Dairy Spray DryersRotary DryersFluid Bed Dryers and CoolersTobacco Primary ProcessingFlour and Grain MillsPowder Coating LinesTyre Plant Mixing and Carbon Black HandlingCarbon Black PlantsBlasting and Painting HallsCoal Handling PlantsMineral Crushing and ScreeningAsh Handling SystemsCaptive Power PlantsPneumatic Conveying SystemsSilo Aeration and FluidisationPlywood and Wood ProcessingGlass Batch HousesIron Ore Pellet PlantsGas Based DRI PlantsDistillery Spent Wash Incineration BoilersRice Mills and Paddy DryersAnimal Feed MillsSpinning MillsPharmaceutical Coating and GranulationLead Smelting and Battery RecyclingJute MillsAlternative Fuel Handling in Cement PlantsFoundry Sand Reclamation

Drive and construction

Offered direct mounted on the motor shaft, direct coupled, or belt driven. Material of construction follows the medium and temperature: mild steel, stainless steel, PP-FRP lined, MS FRP lined or MS rubber lined.

Testing and balancing

Performance tested as per IS 4894, BS 848 Part I, or as per customer standards. Rotors are statically and dynamically balanced to grade G 6.3 or G 2.5 as per ISO 21940-11.

Information needed to select or quote

Duty point. Volume flow and static pressure at the fan inlet, with the gas density and temperature or the conditions to derive it.
Operating conditions. Site altitude, normal operating temperature and continuous or intermittent duty.
Gas stream. Dust loading and particle size, corrosive species, moisture, upset temperature and any tendency of the material to deposit on the impeller.
Mechanical. Rotation viewed from the drive end, discharge orientation and motor power.