Bag Filter Housing find extensive application in scenarios requiring filters capable of handling high flow rates and large dirt-holding capacities. These housings are especially beneficial when dealing with fluid containing significant amounts of suspended solids and demanding high flow rates. 

In this article, you’ll discover some important details about a bag filter housing including its types, components, and material. 

Types of Bag Filter Housing

Bag filter housings are used to hold and support filter bags in various industrial filtration applications. There are several types of bag filter housings available, including:

Single Bag Filter Housing

These housings are designed to hold a single filter bag. They are commonly used in applications with low flow rates or when there is a need for separate filtration of different fluids.

Multi-Bag Filter Housing

Multi-bag filter housings can hold multiple filter bags simultaneously, typically ranging from two to 24 bags or more. They are used in applications that require higher flow rates or when there is a need for continuous filtration without frequent filter bag replacement.

Duplex Bag Filter Housing

Duplex filter housings consist of two separate filter chambers connected by a valve arrangement. This design allows for continuous filtration even during bag change-out. When one chamber is in operation, the other chamber can be cleaned or maintained.

In-line Bag Filter Housing

In-line filter housings are designed for installation directly into a pipeline. They are compact and space-saving, allowing for easy integration into existing piping systems.

These are some of the common types of bag filter housings available in the market. The selection of the appropriate housing depends on factors such as flow rate, operating pressure, filtration requirements, and installation constraints.

What Are the Key Components of Bag Filter Housing? 

The key components of a bag filter housing include the Filter Bag, an Internal Cage providing support, a sealing arrangement, and end connections. Bag Filters are commonly employed as pre-filters to Cartridge Filters, effectively removing coarse suspended particles and extending the lifespan of the filter cartridge. All the components and their functions are explained below:

Housing Body

The housing body is the main structure that contains the filter bags and provides the necessary support and sealing. It is typically made of materials such as carbon steel, stainless steel, or reinforced plastics.

Inlet/Outlet Ports

These are the ports through which the fluid enters and exits the filter housing. They are designed to provide a secure connection and prevent any leaks or bypasses.


The lid or cap of the housing is used to seal the top of the housing body and secure the filter bags in place. It often includes a gasket or O-ring to ensure a tight seal.

Bag Support Basket

Inside the housing, there is a bag support basket or cage that holds the filter bags in position and prevents them from collapsing under the pressure of the fluid flow. The basket is typically made of perforated metal or wire mesh.

Filter Bag

These are the primary filtration elements that capture and retain contaminants from the fluid. Filter bags are usually made of materials such as polyester, polypropylene, nylon, or other specialty fabrics, depending on the application and the type of contaminants to be removed.

Pressure Differential Indicator

Some bag filter housings include a pressure differential indicator or gauge. This component monitors the pressure drop across the filter bags and indicates when they need to be replaced or cleaned.

Drain Valve

A drain valve is often installed at the bottom of the housing to allow for the removal of collected contaminants or to drain the system during maintenance.

Vent/Release Valve

In certain applications, a vent or release valve may be incorporated into the housing to relieve pressure during filter bag changes or to vent gases.

Mounting Bracket or Legs

Bag filter housings are typically mounted on a bracket or legs to provide stability and allow for easy installation in a variety of industrial settings.

These components work together to create an effective filtration system that removes solid particles, debris, and other contaminants from the fluid, ensuring the quality and integrity of the process or product being protected.

How Does the Bag Filter Housing Work?

The industrial bag filter housing comprises a cylindrical body typically constructed from stainless steel.  Depending on the flow rates, this filter vessel can hold one or more filter bags. The liquid to be filtered enters the housing from the top, passing through the filter bag. A restrainer basket supports the filter bag, handling mechanical loads. As the fluid traverses the filter bag, impurities are captured inside it. Subsequently, the purified liquid exits the filter housing through the bottom nozzle.

During the filtration process, the upstream pressure gradually increases until the bag becomes fully clogged. At that point, it becomes necessary to either halt the operation or redirect the flow to another filter body using a valve. By simply opening the cover, the filter bag can be replaced.

Bag Filter Housing Materials – Selecting the Right Material for Your Industrial Filtration Needs!

Different materials are used by one of the top Bag filter housing manufacturers in India to build these products depending on the specific application and requirements. The following are some of the commonly used materials for bag filter housings:

Carbon Steel

Carbon steel is a popular choice due to its strength and durability. It is suitable for most industrial applications and offers good resistance to corrosion.

Stainless Steel

Stainless steel is highly resistant to corrosion, making it an excellent choice for applications involving corrosive fluids or environments. It is available in different grades, such as 304 and 316, offering varying levels of corrosion resistance.

Polypropylene (PP)

Polypropylene is a thermoplastic material that provides excellent chemical resistance. It is lightweight, easy to handle, and suitable for applications involving acids, alkalis, and other corrosive substances.

PVC (Polyvinyl Chloride)

PVC is a popular choice for bag filter housings in applications that involve non-corrosive fluids. It is affordable, lightweight, and easy to install.


In conclusion, bag filter housings are essential components in industrial filtration systems, providing optimal filtration solutions for applications that require high flow rates and large dirt-holding capacities. By understanding the types, components, and material options available for bag filter housings, industries can make informed decisions and implement optimal filtration solutions to meet their specific requirements.

GTS Filters Systems (India) Pvt Ltd offers bag filter housings in a variety of designs, sizes, and kinds to meet your individual requirements. We are renowned as the top Bag Filter Housing Suppliers In India because we only provide high-quality goods and services. Get in touch with us today to learn more!