Gaskets and seals are a vital component in almost every industrial application.
Helping to prevent liquids and gases from escaping and contaminants from entering applications, seals perform a vital function.
However, for seals and gaskets to be effective and operate at optimal levels, it’s vital that you choose the right one for the intended application.
Taking into account material, composition, shape, size, thickness, and more.
At SSP, we know there is no one-size-fits-all industrial o-ring for every application, and we understand that choosing and installing the wrong seal can cause significant problems, making it a costly mistake.
That’s why we work with our customers to ensure compatibility across all seals and gaskets.
To find out more, email us at sales@specialistsealingproducts.co.uk.
In this post, we take a look at two seals in particular, axial and radial, looking at their similarities as well as differences.
Axial seals and radial seals
You will find o rings in:
- Hydraulic applications
- Automotive components
- Industrial applications
- Aerospace
- Food and beverages
- Manufacturing.
There are a range of industrial seals available and when we consider static seals, these can be broken down into two main categories, axial or radial seals.
It is how compression is applied to the cross-section of the o ring that constitutes the main difference between these types of seals.
For example, in radial seals, the inner and external diameters of the o ring is compressed.
For axial seals, compression is spread across both the top and bottom of the seal’s cross-section.
In more detail….
What is a radial seal?
Radial seals are typically used in bore, piston, or plug style applications, and you will find two different types of radial seals – dynamic and static.
Radial dynamic seals are used when a seal has to be placed between two moving/rotating parts.
Radial static seals are used in applications where there is no motion.
Static seals can manage wider and larger gaps within applications. They are also suitable for surfaces that may not be completely smooth and that come with higher pressures. This makes static seals more forgiving than dynamic seals.
What is an axial seal?
When these seals are used, the bottom and top of the o rings cross-section will be compressed into the space.
It is also good to understand that axial seals are useful as a primary seal but they are also often used as a seal in a secondary position.
Axial seals can withstand significant compression and pressure, making them a suitable option for many hydraulic and pneumatic systems.
Typically found within flange-style applications due to their easy manufacture and versatility.
Arial seals vs radial seals
As we know, the main difference between these seals does depend on the direction of compression applied to the o ring’s cross-section.
However, there are other subtle differences to take note of:
Radial seals – prevent fluids and gases from escaping and contaminants from entering the application, ensuring complete protection of the application and its components.
Radial seals are renowned for ensuring proper operations are maintained as well as ensuring the longevity of the equipment due to their efficiency and durable properties.
Axial seals – are also used to prevent leaks and seal the gap between two mating surfaces. Axial seals consist of two rings, one rotating, one stationary, springs, and in some manufactured axial seals a secondary seal. These elements, when combined, provide a robust, extremely durable, and reliable seal.
We use axial seals in pumps, compressors, gearboxes, mixers, and more.
Efficient, ensuring safety, and proper operation, axial seals are a great choice for many applications.
Another significant difference to note between the two seals is when we look at their position and operation within the rotating shaft. Radial seals for example, provide a sealing solution that is parallel across the axis and shaft rotation, whereas axial seals are placed perpendicular across the axis and shaft rotation.
In terms of design, radial seals feature a lip (providing additional sealing capabilities), an external band/layer, and, sometimes, a spring. They are also circular in appearance and shape.
In comparison, the axial seal design consists of a rotating and a stationary ring, with a spring that helps maintain constant pressure. Axial seals are typically flat in their design.
If your application is low-pressure, doesn’t require high tolerances, and involves spinning or rotational motion, opt for radial seals.
If the application requires heavy compression, a tight seal with low tolerance, there is no relative motion, and high pressure is often involved, opt for axial seals.
O ring suppliers Leeds
Choosing the right seal for your application is essential. No one wants to experience costly problems, so understanding the pros and cons of the seals available can help you find the most compatible o-ring for you.
As one of the leading o ring suppliers in the UK, we can offer recommendations on a range of seals and gaskets to suit your application.
Call us today to find out more.
