Bag filter housing is also called a fine filter with a cylindrical shell. Generally speaking, bag filter housing will effectively be made of stainless steel materials or plastic and inside filters can be made of PP, PE, and other filter elements.


Bag filters are convenient and reusable, which makes them preferred by many customers. To have a perfect filtration performance, bag filters should be matched with suitable bag filter housings.

And you might be curious about how to bag filter housing operates. This blog can help you figure out the confusion in bag filter housings.

Different types of the bag filter housing

There are several types of common used bag filter housings, they varies from flow directions and how many filter bags it can contain.

Single bag filter housing

According to different inlet position, we got two types of single bag filter housing, which are top in single bag filter housing and standard single bag filter housing.

It is shown by their names, that top-in single bag filter housing has top-in and bottom-out flow direction while standard single bag filter housing adopts conventional side-in way.

single bag filter housing

Multi-bag filter housing

Multi-round bag filter housing can equip with bag filters from 2 to 23 pcs. With more bag filters inside, it has higher filtration efficiency and higher flow rate. They are particularly useful for filtering large volumes of high-viscosity liquids.

multi bag housing

The operating principle of bag filter housing

The operating principle of the bag filter housing is pressure filtration which is a new type of filtration system. The bag filtration system all observes straightforward principle. The bag filter is supported by a metal mesh basket in the housing. The liquid flows in from the inlet and flows out from the outlet after filtered by the bag.

In the process of using, the equipment can effectively press or draw liquid medium into the barrel of other equipment filters though the pressure in the pipeline. Impurities are intercepted in the filter bag and housing can be continuously used after changing or cleaning the filter bag.

Steps for changing bag filters

Filter bags must be changed in order for the bag filter housing to continue operating as intended. Unmaintained filter bags can harm systems, reduce production efficiency, and cause expensive clogs.

change filter bag

Monitoring the pressure drop across your filter housing is crucial. The clean pressure drop for filters is typically 2-3 PSID. When the pressure differential reaches 15 psid, bag filters are regarded as unclean.

The bag filter system is always a simple and easy operating system, you just need to open the lid of the bag filter housing and take out the dirty filter bags.

Then, put the clean filter bags inside and close the lid. You should notice that the lid has been totally and entirely closed, the sealing is one of the key factors to filtration performance.

With appropriate design, Brother Filtration bag filter housings are easy to open without special tools. If you want to know how to reuse your filter bags, you can read the blog about how to correctly wash filter bags

Benefits of bag filter housing

benifits of bag filter housing

Bag filter housing also has the advantages of strong corrosion resistance and high dirty capacity when used.

The entire equipment has good temperature resistance and convenient operation, and also has a long service life and large flow. Meanwhile without fiber shedding. So it is very popular with customers.

The bag filter housing has good sealing and reasonable structure so that the device has a strong circulation and is easy to operate during operation.

The probability of side leakage of the filter bag of the entire device is small so that the filtering accuracy can be correctly guaranteed. Quickly replace the filter bag inside.


As a efficient and convenient filter housing, bag filter housing is powerful and competitive. It is easy to operate and maintain, to some extent, improves efficiency and productivity. Though it has simple working principle, it has perfect filtration performance.

Brother Filtration manufactures bag filter housings in different materials, sizes and flow directions, with years of filtration experiences, is able to provide high-quality filter products to customers. If you still have any problem about bag filter housings, please feel free to contact us.

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