Depth Filters – what are they?

As an ongoing feature we will be discussing the different types of filters on the market. Giving you the help you might need to solve a filtration problem. Many people come to a filter company like us and don’t really know what they are looking for – that’s why we and our Distributors are here to help.

In this post we will be talking about Depth Filters

Depth Filters are a type of filter element that uses a porous filtration medium to retain particles throughout the medium, rather than just on the surface of the medium like mesh filters and strainers.

Depth filters are commonly used when the fluid to be filtered contains a high dirt load or where extended filter life is required because, relative to other types of filters, depth filters can retain a large mass of particles before becoming clogged.

What determines a good filtration medium?

The best depth filter on the market is undoubtedly the bonded borosilicate glass microfibre filter element, why is this type of filter so good?

Well the borosilicate glass fibre element has several advantages over other filtration mediums:

1. It has a very high level of efficiency
2. It can be bonded with several different types of binder giving a wide chemical resistance range combined with a good operating temperature range
3. Very importantly, it has a very open structure.

With over 90% void volume the bonded microfibre filter element gives a very low initial differential pressure, important in most instrumentation applications, and it also gives a very high dirt holding capacity, giving a long service life in both particulate and coalescing applications.

What do you think is the best filter element?

Do you agree the bonded borosilicate glass microfibre filter element is the best? Or do you have another suggestion. Let us know in the comments below.


Classic Filters has a full range of Depth Filters to help solve your filter problem, so don’t hesitate get in touch.

You can leave a comment below or contact us by calling +44 (0)1634 724224, use the form on the right or send us an email to [email protected]


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