Bag Filers



The pulsejet bag filter consists of filtration elements encased in housing. Below this casing is a hopper with a discharge valve, to remove the dust that is collected on the bags. The entire unit is supported from the ground on structural legs.

Dust laden air enters through the hopper by suction. The heavier dust particles fall off at the entry itself, while the lighter dust gets carried upward to the bags. The dust gets deposited on the outer surface of the bags and clean air moves out from the centre of the bags and escapes out from top air outlet. This is known as filtration.

The dust collected on the outer surface of bag is removed in a pre-determined cycle by a momentary pulse of high-pressure compressed air. The compressed air moves from an air reservoir or compressed air header, via the particular pulse valve into the compartment manifold and thereon into the bags, in the row beneath it.

Due to the pressured entry of compressed air into the bags, the bags get inflated. Thus the dust is collected on the bag as flakes falls down. Soon the bag comes back to its original position and the cleaning process is completed.

Dust flakes fall from the sides of the hopper and slide into the rotary air lock valve. As the valve travels clockwise, the dust trapped in between the vanes gets discharged from the opening below.


Salient Features

  • Highly efficient & quick pulse of cleaning air
  • Lower pressure drop of cleaning air due to elimination of bend in pulsing system
  • Effective Flushing of dust
  • Effectively flushes the bag & reduces re-deposition of fine dust
  • Can clean bags having long length
  • Cleans the internal of the filter media to have lower longer term pressure drops
  • The filter media is not flexed as extensively as in the conventional cleaning, thus increasing the media life


  • Foundry & Steel
  • Cement
  • Boilers Flue Gas
  • Kiln Exhaust
  • Solids Drying
  • Mining and Minerals
  • Glass
  • Particle Board Mfg
  • Wood-Working and laminates
  • Air Pollution Control Systems
  • Hot Gases and Fumes
  • Coal Handling