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Bag Filter Housing Selection: Key Factors to Consider

Kaitlyn ColliganKaitlyn Colligan avatar

Kaitlyn Colligan

7 minute read

Choosing the right bag filter housing is crucial to achieving effective filtration and maintaining the integrity of your industrial processes. With a myriad of options available in the market, understanding the key factors to consider becomes paramount. Let's explore the essential factors that should influence your bag filter housing selection process. By highlighting these factors, we aim to equip you with the knowledge to make informed decisions that align with your specific filtration system requirements.

Flow Rate Requirements

The flow rate refers to the rate at which fluid, typically a liquid, passes through the filtration system. It is measured in gallons per minute (GPM) and indicates the volume of fluid that can be processed within a specific time frame. The flow rate is an important parameter to consider in bag housing filtration systems as it directly affects the efficiency and performance of the filtration process. Choosing an appropriate flow rate for bag housing filtration depends on several factors, including the specific application, desired filtration efficiency, the capacity of the system, and the pressure limitations. It is crucial to ensure that the flow rate is within the recommended range to maintain optimal filtration performance and prevent issues like clogging or excessive pressure drop. Flow rates can vary based on the size and type of bag housing, the number and size of filter bags being used, and the characteristics of the fluid being filtered. Manufacturers usually provide guidelines and specifications for the maximum flow rates that their bag housing systems can accommodate effectively.

Filtration Needs and Applications

Each application comes with its unique set of challenges and requirements. That's why it's crucial to carefully assess your filtration needs in order to select the perfect bag filter housing for the job.


Understanding the type and size of contaminants you need to remove from your process media is essential. Are you dealing with fine particulates, microbes, or chemicals? Identifying the specific contaminants will help determine the appropriate filter media and micron rating for effective filtration.


Compatibility with the process media is another vital consideration. It's important to ensure that the bag filter housing and its components are constructed from materials that can withstand the conditions present in your application. Factors such as temperature, pressure, and the nature of the process fluid should be taken into account. Chemical resistance is particularly important if you're working with corrosive or aggressive substances. Selecting a bag filter housing that is compatible with your process media will guarantee long-lasting performance and prevent any potential issues.

Filtration efficiency

Filtration efficiency is a critical factor that should not be overlooked. Different applications require varying levels of filtration. Understanding your desired filtration efficiency will allow you to choose the appropriate bag filter housing design and specifications. Systems with multiple bag chambers or high-capacity housings may be necessary for applications where a higher flow rate or a larger filtration area is required.

Material of Construction

The choice of material is a key factor that significantly impacts the longevity and performance of your filtration system. Selecting the right material ensures resistance to corrosion and other potentially harmful interactions, making it essential to consider several factors in making an informed decision.

Stainless Steel

One of the most common materials used in bag filter housing construction is stainless steel. Stainless steel has two options you can choose from, either 304SS or 316SS. Stainless steel offers excellent durability, corrosion resistance, and mechanical strength, making it suitable for a wide range of industrial applications. It is particularly well-suited for processes involving high temperatures, aggressive chemicals, or demanding operating conditions. Stainless steel bag filter housings are built to withstand the test of time and provide reliable filtration even in harsh environments.

Carbon Steel

Carbon steel is another popular option for bag filter housing construction. It offers strength and reliability at a relatively lower cost compared to stainless steel. Carbon steel bag filter housings are suitable for applications that do not involve corrosive fluids or environments. However, it is crucial to maintain and protect carbon steel housings from rust and corrosion by applying coatings or implementing regular maintenance practices.


In addition to metal housing materials, various thermoplastics, such as polypropylene or PVC, are commonly used. Thermoplastic bag filter housings offer excellent resistance to a wide range of chemicals while being more cost-effective compared to metal options. These housings are lightweight, easy to install and maintain, making them ideal for applications where corrosion or chemical compatibility is a concern. However, it is crucial to verify compatibility with your specific process fluids to ensure long-term performance.

Design and Ease of Use

When selecting a bag filter housing, the design and ease of use are crucial factors that directly impact operational efficiency and maintenance. Considering various design elements will ensure a user-friendly system that minimizes downtime and maximizes filtration system performance. Ease of bag installation is an essential consideration. Look for a bag filter housing design that simplifies the installation process, allowing for quick and hassle-free bag changes. Features like a swing-bolt closure or a lid that can easily be lifted make it convenient to access the interior for bag installation or removal. Sealing mechanisms are another critical aspect to consider. A secure and reliable sealing mechanism helps maintain a tight seal around the filter bag, preventing bypass and ensuring efficient filtration.

Regulatory Compliance and Certifications

When selecting a bag filter housing, regulatory compliance and certifications are crucial factors to consider, especially in industries where adherence to specific standards is required. Compliance with standards such as FDA (Food and Drug Administration), NSF (National Sanitation Foundation), or ASME (American Society of Mechanical Engineers) ensures that the bag filter housing meets necessary quality and safety measures, and is suitable for your specific application.


Regulatory compliance is particularly crucial in industries where filtration systems are used for critical processes, such as food and beverage, pharmaceuticals, or water treatment. For example, in the food and beverage industry, compliance with FDA regulations is necessary to ensure that the bag filter housing materials and construction meet the stringent requirements for contact with consumable products. Similarly, NSF certifications ensure that the bag filter housing is designed and constructed to meet specific sanitary standards for applications involving water or food contact.


In other industries, such as oil and gas or chemical processing, compliance with industry-specific regulations and certifications may be necessary to ensure the durability, performance, and safety of the bag filter housing when exposed to harsh or hazardous environments. Certifications such as ASME reinforce the structural integrity and pressure vessel compliance of the housing, offering peace of mind regarding its suitability for high-pressure applications.

Selecting the right bag filter housing is a critical decision that directly affects the performance and integrity of your filtration system. To achieve optimal filtration performance and maintain the efficiency of your industrial processes, it is essential to consider several key factors. Evaluating flow rate requirements ensures that the chosen housing can handle the desired volume of fluid efficiently. Assessing your filtration needs, including the type and size of contaminants, filtration efficiency requirements, and compatibility with process media, helps you select the appropriate filter media, micron rating, and housing configuration. Carefully considering the material of construction ensures longevity, corrosion resistance, and compatibility with process fluids. Examining the design and ease of use factors, such as bag installation, sealing mechanisms, and maintenance accessibility, enhances operational efficiency and simplifies maintenance procedures. Additionally, verifying regulatory compliance and certifications relevant to your industry or application guarantees the housing meets necessary quality, safety, and suitability standards. By weighing these factors and making a well-informed decision, you can confidently choose a bag filter housing that aligns with your specific filtration requirements, ensuring optimal performance and the integrity of your industrial processes.

At, we understand the importance of choosing the right bag filter housing. With our extensive range of high-quality bag filter housings and the expertise of our filtration specialists, we are here to assist you in finding the ideal solution for your industrial filtration needs. Browse our product offerings and contact our team to begin optimizing the performance and efficiency of your filtration system today.

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