Unveiling the Mechanism: How Does a Bag Filter Housing Work?

In industrial filtration, Bag Filter Housing play a major role in ensuring the purity and quality of various processes. These robust filtration systems are designed to capture and remove contaminants from liquids, offering an effective solution for industries ranging from water treatment to chemical processing. Understanding the inner workings of a bag filter housing can shed light on its efficiency and significance in maintaining operational excellence.

Bag Filter Housing: How Does it Work?

A bag filter housing functions as a barrier against impurities present in liquids. The process begins when the liquid flows into the housing, and a specially designed filter bag captures particles as the liquid passes through. The bag itself acts as the primary filtration element, trapping contaminants and allowing only clean fluid to exit the system. Moreover, the filter bags used in these housings are made from various materials, such as polyester, polypropylene, or nylon, each chosen based on the specific needs of the application. The design of the bags ensures efficient particle retention while allowing for a smooth flow of the liquid through the system.

Furthermore, another type of filter housing is Basket Filter Housing which removes foreign particles from a horizontal pipeline by using a mesh screen. The basket filter working principle is a little different from the bag filter. In this, the liquid to be filtered flows into the apparatus through the input before entering the basket strainer. The liquid then starts to pass through the basket after being secured by the bracket. Pollutants will be captured in the basket throughout this procedure, and clean liquid will flow out.

Factors Influencing Bag Filter Housing

Micron Rating

The micron rating of a filter bag is a crucial factor in determining its filtration efficiency. It represents the size of particles that the bag can effectively capture. Smaller micron ratings indicate a finer filtration capability, making the bag suitable for applications where a higher level of purity is required. 

Material Compatibility

The choice of filter bag material is influenced by the nature of the liquid being processed. For example, chemical compatibility is crucial to ensure that the bag material does not react with or degrade when exposed to specific substances. Polypropylene bags are often preferred for their chemical resistance, while polyester bags offer durability and resistance to biological growth.

Flow Rate

The flow rate of the liquid through the bag filter housing is a critical factor in maintaining optimal filtration performance. Proper sizing and selection of the housing ensure that the flow rate matches the system’s requirements. Insufficient flow rates may result in incomplete filtration, while excessive rates could lead to premature wear and reduced efficiency.

Temperature and Pressure

The operating temperature and pressure of the liquid within the system must be considered when selecting a bag filter. Different applications may require housings designed to withstand high temperatures or pressures, ensuring the longevity and effectiveness of the filtration process.

Installation and Maintenance

The ease of installation and maintenance is a practical consideration. Efficient designs facilitate quick and hassle-free bag changes, minimizing downtime and operational disruptions.


A bag filter housing operates as a frontline defense against contaminants in liquid processes, employing specially designed filter bags to ensure the purity of the final product. The efficiency of these filtration systems is influenced by factors such as micron rating, material compatibility, flow rate, temperature, and pressure. By understanding these elements, industries can make informed decisions when selecting and maintaining such filter housings.

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