Filter Cages

Pulse-jet style baghouses are designed to utilize fabric filter bags with internal support structures commonly referred to as cages. Cages provide a means of holding the filter bag open during the particulate collection cycle.

Cages must be selected with the proper structure design to conform to the fabric requirements. Cages sizes, both length and diameter, can be crucial the success or failure of the filter bag.

Where moisture or chemical conditions create an environment that is corrosive to metal, the cages can be produced from stainless steel or carbon steel with variety of available coatings. Coatings such as epoxy are commonly used for corrosive environments. Special paints or electroprocessed finishes such as electro galvanizing are also available to protect against corrosion. Variety of sizes, 6 to 20 vertical wires, ring spacing and with a variety of cage-top designs, Venturies, caps or tube sheet.

Additionally, they are available with a variety of coating and finishes in both carbon steel and stainless steel.

Filter cages in round shape
In diameters of 82mm to 200mm and lengths from 200mm to 7000mm in one part.

Large variety of shapes, materials, finishing treatments, junctions and collars. The diameter and the type of the filter sleeve are the main criteria for the vertical rods and the support rings spacing, we can offer 6, 8, 10, 12, 16, and 20 rods in round cages.

Made at the customer’s request, according to material type of coating or treatment, also can be manufactured in stainless steel .


  • Carbon steel
  • Pre-galvanized carbon steel
  • Stainless steel AISI 304, 304L, 316, 316L, 316Ti

Type of finishing

  • Epoxy and polyester powder coated
  • White or yellow galvanization

Star type cages
Used to achieve greater cleansing of the sleeves, less air consumption, although not always beneficial as there are sleeves which this cannot be used since they would deteriorate.

(Star ring cages, 10 rods only)

Lenghts: from 200 mm to 7000 mm.


Made at the customer’s request, according to the customer’s needs with many types of standard collars

Ring articulation

Also in this way prevents possible breaks of the sleeves due to bad assembly.

Flat cages
Made to customer’s request, Can be made in different qualities and finishes as also the rest of the filter cages above