Baghouse Bags And Cages

Baghouse bags and cages is the core filtration assembly of a baghouse. The bag is made of needle felt or woven fabric, fitted over the metal cage, and installed together on the baghouse tube sheet. Dust-laden gas passes through the bag; dust is retained on the outer surface, and clean gas passes through the media and exits. The cage keeps the bag open during filtration, cleaning, and reverse-air operation, preventing collapse under negative pressure or pulse jet. The assembly is suitable for matching and replacement in pulse-jet baghouses and compartment reverse-air baghouses.

• Bags and cages are supplied as a matched set to reduce on-site fitting errors.
• Bag diameter and length are customized to tube sheet hole dimensions; cage diameter takes negative tolerance (0–1.8 mm), length tolerance 0–10 mm, ensuring the bag fits without being too tight.
• Cage longitudinal wire quantity 8–24, support ring spacing 150–200 mm, matched to bag material and filtration velocity.
• Acrylic medium-temperature needle felt is suitable below 130°C, with heat calendering and singeing, good air permeability, and chemical stability.
• High-temperature Metas membrane bags are used in steel, power, and asphalt mixing industries. High-temperature PPS needle felt bags are used in raw coal boilers, waste incinerators, and power plant fly ash collection.

• Bag diameter and length customized to tube sheet hole and housing dimensions
• Bag material selected to flue gas temperature and composition
• Cage longitudinal wire quantity adjusted to bag material and filtration velocity
• Cage surface treatment: galvanized, powder coating, silicone coating
• Oval, flat, and split-type cages available
• Venturi supplied as matching accessory
• OEM/ODM: customized to sample or drawing; customer brand on bag tag and packaging

After bag sewing, each bag is checked for stitch continuity, stitch spacing, and spring ring fixation. After cage welding, each cage is checked for wire-to-ring welds, confirming no missed, weak, or incomplete welds. Silicone-coated cages are additionally checked for coating uniformity and adhesion. 100% visual inspection before packing, with dimensions, stitching quality, and surface treatment recorded. Third-party inspection accepted. The factory has supplied this assembly to cement, steel, power, and waste incineration projects, and uses this field data to match bag material with cage wire spacing and coating.