Filter Bag Cage

Filter Bag Cage,also known as filter bag frame,is a key supporting component inside bag‑house dust collectors.It provides rigid support for filter bags,preventing filter bags from collapsing under negative‑pressure suction and maintaining correct bag shape during dust filtration and pulse‑jet cleaning cycles.Without stable cage support,filter bags easily deform,abrade and suffer premature failure.Different cages vary in wire density,surface treatment and structural form to adapt to different flue gas temperature,humidity and corrosive conditions.Widely matched with pulse jet bag dust collectors in environmental‑protection,cement,metallurgy,chemical and building‑material industries,it guarantees stable filtration performance and extends filter bag service life.

The filter bag cage forms a cylindrical skeleton welded by vertical steel wires and circular reinforcing rings.Installed inside the filter bag,it holds the fabric fully expanded.During dust‑collector operation,negative pressure from the fan presses the filter bag against the cage wires.When pulse‑jet compressed air blows backward for dust cleaning,the cage resists impact force and keeps the bag from shrinking or twisting.Smooth welding and burr‑free surface avoid scratching filter‑bag fabric.Top mounting fit with venturi or snap‑on connections ensures fast installation inside the dust‑collector cell plate.Bottom closed‑end structure prevents filter‑bag sagging and wear.

Raw materials include carbon steel wire and stainless‑steel wire.Standard carbon‑steel cages go through surface treatments such as galvanizing,epoxy spraying and silicon coating to resist moisture and mild corrosion.Stainless‑steel cage(304/316L)is selected for high‑temperature,humid or strong‑corrosive flue gas.The cage can be manufactured as integral one‑piece type or multi‑section split type for convenient transportation and installation for tall dust‑collector housings.Wire quantity,ring spacing,diameter and height can be customized according to filter‑bag dimensions.Venturi tubes,top quick‑fit connectors and bottom protection caps are available optional accessories.

Compared with low‑quality rough‑welded cages,high‑grade filter bag cage features smooth welding spots without sharp burrs,greatly reducing mechanical abrasion on filter bags.Reasonable wire density and ring layout balance supporting strength and airflow permeability.Multiple anti‑corrosion surface treatments correspond to different flue‑gas working conditions.Split‑section cages solve transportation difficulties for extra‑tall filter bags.Precise dimensional tolerance ensures good matching with filter bags and tube sheet holes,avoiding air leakage caused by poor fit.

Important operation notes:select proper material and surface coating according to flue‑gas temperature,humidity and corrosive components.Burrs and sharp welding points must be eliminated;otherwise filter bags will be punctured in short service time.Avoid collision and deformation during transportation and installation.Deformed cages shall be replaced in time;distorted frame will cause local filter‑bag friction damage.Regular inspection inside dust collector to check cage corrosion,breakage and loose welding joints.

Filter Bag Cages are extensively used in pulse‑jet bag‑house dust collectors for cement plants,metallurgical workshops,chemical factories,waste incineration facilities,grain processing and mining dust‑removal projects.As indispensable supporting parts for filter bags,it combines stable structural strength,anti‑corrosion performance and precise dimensional accuracy.It effectively protects filter bags,lowers replacement frequency and maintains long‑term efficient operation of dust‑collector systems.