Bag Filter Housing: The Ultimate Guide for Industrial Filtration
2026-05-15
Bag filters have become the go-to choice for industrial filtration thanks to their convenience, reusability, and cost-effectiveness—and with this rising popularity, the demand for high-performance bag filter housings has surged. While many professionals are familiar with cartridge filter housings, bag filter housings remain a less understood solution for some.
At TS Filter, we' re breaking down everything you need to know about bag filter housings: from materials and types to key selection tips, this guide will help you choose the perfect housing for your application.
What Is a Bag Filter Housing?
A bag filter housing is a sealed, pressure-rated vessel designed to hold filter bags in place during liquid filtration. Together, the housing and filter bag form a complete fluid pollution control system that captures particulates from industrial process streams.
The housing creates a controlled environment where fluid flows through the filter bag, ensuring consistent, efficient filtration while containing pressure and preventing leaks.
Common Materials for Bag Filter Housings
The material of your bag filter housing is critical—it must match your operating conditions (temperature, chemical exposure, pressure) to ensure longevity and performance. The two most common options are stainless steel (304/316L) and plastic (for low-cost, non-corrosive applications).
Stainless Steel: 304 VS 316L
Stainless steel is the gold standard for industrial bag filter housings, with two primary grades offering distinct benefits:
| Stainless Steel Difference | SS 304 Stainless Steel | SS 316 Stainless Steel |
|---|---|---|
| Material Composition | Alloy of 18% chromium and 8% nickel | Alloy of 10% nickel, 2% molybdenum, and 16% chromium |
| Key Advantages | Excellent corrosion and oxidation resistance, cost-effective | Superior heat and corrosion resistance (especially against chlorides and saltwater) |
| Ideal Applications | Pressure vessels, tanks, general industrial piping, and standard liquid filtration | Chemical processing, and high-temperature applications |
Plastic housings are also available as an economical alternative for low-pressure, non-corrosive applications, but stainless steel remains the preferred choice for most industrial settings due to its durability and chemical resistance.
Types of Bag Filter Housings
Bag filter housings are categorized by the number of filter bags they hold, with two main options: single-bag and multi-bag housings.
| Bag Filter Housing Difference | Single Bag Filter Housing | Multi Bag Filter Housing |
|---|---|---|
| Filter Bag Capacity | Holds only one filter bag element | Holds more than one filter bag element (2 to 24+ bags) |
| Common Materials | Plastic, stainless steel 316 or 304 | Stainless steel 316 and 304 (standard for industrial use) |
| Pressure Ratings | Working pressures ranging from 100 PSI to 300 PSI | Standard design pressure of 150 PSIG (custom ratings available) |
| Best For | Low-flow applications, small-scale processes, or batch filtration | High-flow systems, continuous operations, and processes requiring redundant filtration |
Multi-bag housings, like the one pictured above, offer higher flow rates and the ability to service multiple streams simultaneously—making them ideal for large-scale industrial operations.
How to Choose the Right Bag Filter Housing
Selecting the right housing requires careful consideration of your system' s unique needs. Here are our top tips from TS Filter' s filtration experts:
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Define Your Filtration System First, confirm whether you need a single housing or multiple housings working in parallel/series. High-flow or critical processes may benefit from multi-bag setups for redundancy and uninterrupted service.
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Prioritize Easy Maintenance Choose a housing with a user-friendly cover design that allows quick, tool-free opening/closing. Look for compact designs with ample internal space to simplify filter bag removal, cleaning, and replacement.
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Match Flow Rate and Micron Rating Your housing must accommodate your system' s required flow rate without sacrificing filtration efficiency. We recommend filter bags with a micron rating between 0.5μm and 200μm for most applications—this range captures particulates of all sizes while maintaining high throughput.
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Size Matters Ensure the housing dimensions (width, length, and internal capacity) match your chosen filter bags and fit your available installation space. Ill-fitting bags can cause leaks or reduced filtration performance.
Why Choose TS Filter for Your Bag Filter Housing?
As the old Chinese saying goes: ''A good horse deserves a good saddle.'' A high-quality filter bag is only as effective as its housing—and TS Filter designs housings that maximize performance, durability, and ease of use.
All our stainless steel housings are precision-engineered to withstand harsh industrial conditions, with customizable options for pressure ratings, materials, and configurations. Whether you need a single-bag housing for a small-scale process or a multi-bag system for a high-flow plant, we' ll tailor a solution to your exact specifications.
Ready to upgrade your filtration system? Contact TS Filter today to discuss your application, and let our experts help you find the perfect bag filter housing for your needs.