Introduction
In any pulse-jet or reverse air dust collector system, filter cages are critical components that support filter bags during operation. Though often overlooked, the right cage can significantly influence filter bag performance, durability, and the overall efficiency of your dust collection system.
At Unimarshal Technologies Pvt. Ltd., we specialize in delivering robust, long-lasting filter cages designed to enhance filtration performance across a wide range of industries.
What Are Filter Cages?
Filter cages are metal structures—typically made from mild steel, stainless steel, or galvanized steel—that provide internal support to fabric filter bags. They ensure that the filter bags do not collapse during filtration and allow efficient pulse cleaning by maintaining the shape and airflow path inside the bag.
Why Filter Cages Are Important
1. Structural Support
Without a cage, the filter bag would collapse under vacuum or airflow pressure, rendering filtration impossible.
2. Improved Cleaning Efficiency
Cages help the pulse-jet cleaning system dislodge dust more effectively by keeping the bag open and evenly spaced.
3. Longer Filter Life
Well-designed cages reduce filter bag abrasion and mechanical stress, extending their operational life.
4. Custom Fit for Better Performance
Properly fitted cages ensure that there’s no gap between the cage and the bag, preventing leakage or dust bypass.
Types of Filter Cages
| Type | Description | Common Uses |
|---|---|---|
| Round Cage | Traditional shape, simple design | Cement, steel plants |
| Oval Cage | Compact for limited space systems | Power plants, compact baghouses |
| Star Cage | Increased surface area contact | High-efficiency systems |
| Split Cages | Two-piece designs for easy assembly | Retrofits and space-constrained setups |
| Venturi Cages | With a venturi at the top for pulse air velocity | High-pressure systems |
Material Options
- Mild Steel: Cost-effective, used in dry, non-corrosive environments
- Galvanized Steel: Corrosion resistance for general industrial use
- Stainless Steel (SS 304/316): For high-temperature or corrosive environments
At Unimarshal, we manufacture cages using automated welding and offer epoxy, silicon, and PTFE coatings to extend cage life in harsh conditions.
How to Select the Right Filter Cage
Consider the following when selecting a filter cage:
- Dust Collector Type – Pulse-jet, shaker, or reverse air systems have different requirements.
- Operating Temperature – Choose materials that can withstand your system’s temperature range.
- Bag Size & Type – Diameter, length, and fabric material of the filter bag must match the cage.
- Corrosive Environment – Opt for stainless steel or coated cages in aggressive conditions.
- Maintenance Accessibility – Split cages or custom designs help with easier replacement.
Applications Across Industries
- Cement & Lime Kilns
- Steel & Metal Processing
- Food & Pharma Manufacturing
- Power Plants & Boilers
- Woodworking & Pulp Mills
- Chemical & Petrochemical Facilities
Why Choose Filter Cages from Unimarshal?
Precision-engineered for perfect fit
Variety of materials and coatings available
Long service life with minimal maintenance
Custom designs available for OEMs and retrofits
Fast delivery across India and global export markets
Conclusion
Filter cages are more than just a frame—they’re the backbone of a high-performance dust collection system. Choosing the right cage helps extend filter bag life, improve cleaning efficiency, and minimize system downtime.
Contact Unimarshal Technologies Pvt. Ltd. today to get expert guidance and high-quality filter cages tailored to your industry.
