Rotary Unions, Swivel Joints,
Air Breather Filters, Flexible Hoses


Designed and Manufactured in the UK, Supplied Worldwide for over 75 years.

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Advantages of Bellows Seal

Friday 28th August 2020

Let's take a look at the advantages of using a Bellow Seal instead of a Mechanical seal.

Advantages of a Bellows Seal

There are a couple of advantages to having a bellow seal instead of the standard mechanical seal. Filton use a Bellows seal within all their standard Rotary Unions, the operating temperature range can be between -20⁰C to +300⁰C.

The advantages are;

-        A Bellows seal does not require an elastomeric ‘O’ Ring which can limit the operating temperature and chemical compatibility. 

-        A Bellows seal does not have any moving parts with close clearances which could seize due to corrosion or debris within the system.


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