Encapsulated O-Rings are seals designed specifically to address common sealing problems in the industry. These seals combine the excellent chemical and thermal resistance of PTFE with the flexibility required for sealing various fluids in any type of installation.

There are two types of encapsulated O-rings:

O-rings with a solid core:

These encapsulated O-rings feature a core of silicone or FKM (Viton). Both materials offer excellent elasticity and compression, with silicone being more suitable for use in very low-temperature environments.

O-rings with a hollow core:

These encapsulated O-rings are ideal when extreme elasticity is required. Although they may compromise compression/recovery balance, they are perfect for fragile applications.

Regardless of the type of inner core of the seal, encapsulated O-rings may have an outer cover made of PFA or FEP. PFA is excellent for resisting corrosive chemicals, while FEP has similar characteristics but is slightly weaker in terms of mechanical behavior.

The advantages of encapsulated O-rings are:

Excellent resistance to different types of media, especially chemically aggressive ones.
Wide range of operating temperatures, both at high and low temperatures.
Essential in the pharmaceutical and food industries, as they are made with FDA-approved materials, making them suitable for food and drug processing applications.
Ideal for applications where hygiene control is necessary.
Provide suitable sealing solutions in the chemical and petrochemical industries.

Despite their wide range of applications, encapsulated O-rings also have certain limitations.

Firstly, it’s important to avoid their use in dynamic applications. These parts are more suitable for static applications or low-speed rotating applications.

Because their outer cover is very thin, the seals can be damaged when in contact with grit or abrasive products, so their use in such environments should be avoided.

At Manufactures Cusell, we have a team of experts who will provide you with all the information you need if you require O-rings for any type of application, whether encapsulated or “standard” O-rings without an outer cover. We can supply O-rings in a wide variety of materials (FFKM, FPM, HNBR, VMQ, AFLAS, etc.), sizes, hardness, colors, etc. Contact us for more information!

If you would like to learn more about our production, we invite you to follow the link: Manufactures Cusell

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