In modern industrial filtration systems, bag filter housing plays a critical role in removing solid contaminants from liquids efficiently and economically. From water treatment and chemical processing to food & beverage and oil & gas industries, bag filter housings are widely used for their high flow capacity, simple operation, and cost-effective maintenance.
This article provides a comprehensive overview of industrial bag filter housing, including types, materials, working principles, applications, and how to choose the right solution for your filtration needs.
A bag filter housing is a pressure vessel designed to hold a filter bag and allow liquid to pass through it, capturing suspended solids and impurities inside the bag. The filtered liquid then exits the housing clean and ready for downstream processes.
Compared with cartridge filters, liquid bag filter housings are ideal for applications requiring:
High dirt-holding capacity
Medium to coarse filtration
Lower operating costs
The working principle of a bag filter housing is simple and reliable:
Unfiltered liquid enters the housing through the inlet.
The liquid flows inside the filter bag.
Solid particles are retained inside the filter bag.
Clean liquid exits through the outlet.
Once the bag is full, it is replaced easily.
This straightforward design minimizes downtime and reduces maintenance costs, making industrial bag filter housings a preferred choice in continuous operations.
A single bag filter housing is suitable for low to medium flow rate applications. It is compact, easy to install, and widely used in:
Small water treatment systems
Chemical dosing filtration
Pre-filtration processes
Common sizes include size 1 bag filter housing and size 2 bag filter housing, with size 2 being the most popular due to higher flow capacity.
A multi bag filter housing contains multiple filter bags inside one vessel, allowing much higher flow rates. It is ideal for:
Industrial wastewater treatment
Process water filtration
Large-scale chemical plants
Multi-bag designs reduce pressure drop and extend bag service life.
A duplex bag filter housing consists of two housings connected by a valve system. One housing operates while the other is on standby, ensuring:
Continuous filtration
Zero downtime during bag replacement
This type is commonly used in critical industrial processes.
Stainless steel bag filter housing is the most widely used option due to its durability and corrosion resistance.
SS304 bag filter housing: suitable for general industrial applications
SS316 bag filter housing: ideal for corrosive liquids and sanitary processes
These housings are commonly used in food, beverage, pharmaceutical, and chemical industries.
Carbon steel bag filter housing offers excellent strength and cost efficiency. It is suitable for:
Oil and gas filtration
Paint and coating filtration
Heavy industrial processes
Surface coatings can be applied for enhanced corrosion protection.
Polypropylene bag filter housing is lightweight and chemically resistant, making it ideal for:
Acid and alkali filtration
Water treatment systems
Low-pressure applications
Choosing a bag filter housing offers several advantages:
High flow rate with low pressure drop
Large dirt-holding capacity
Easy installation and maintenance
Lower operating cost compared to cartridge systems
Wide compatibility with different filter bag materials
These benefits make industrial bag filter housing a reliable solution for liquid filtration.
Bag filter housing for water treatment removes sand, rust, and suspended solids in:
Municipal water plants
Industrial process water
Cooling water systems
In chemical processing, bag filter housing ensures product purity by filtering:
Solvents
Resins
Acids and alkalis
Sanitary bag filter housing is used to filter:
Syrups
Edible oils
Beverages
Polished stainless steel designs meet hygiene standards.
High pressure bag filter housing is widely used for:
Lubricating oils
Fuels
Paints and coatings
When selecting a bag filter housing, consider the following factors:
Flow rate requirement
Operating pressure and temperature
Liquid compatibility with housing material
Filtration accuracy of the filter bag
Installation space and connection type
Working with an experienced bag filter housing manufacturer ensures the best solution for your application.
| Feature | Bag Filter Housing | Cartridge Filter Housing |
|---|---|---|
| Flow capacity | High | Medium |
| Dirt holding | Large | Smaller |
| Replacement cost | Lower | Higher |
| Best use | Pre & medium filtration | Fine filtration |
For many industrial applications, bag filter housing provides better cost-performance.
A reliable bag filter housing supplier can offer:
Custom design and OEM service
ASME / ANSI compliant vessels
Competitive pricing and fast delivery
Technical support and after-sales service
Choosing the right partner directly impacts system performance and operating cost.
Bag filter housing is an essential component in industrial liquid filtration systems. With various materials, configurations, and sizes available, it provides flexible and cost-effective filtration solutions for a wide range of industries.
Whether you need a single bag filter housing, multi bag filter housing, or a fully customized industrial solution, selecting a professional manufacturer ensures long-term reliability and optimal filtration performance.
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