Gaskets vs. O-Rings: Differences & Common Applications

Knowing the differences between the available seal materials is essential when choosing the right seal for your application. When selecting the proper seal for your application, you may wonder what the differences between gaskets and O-rings are. Both are common types of seals in various applications, but there are some key differences that you should be aware of.

What are Gaskets and O-Rings?

Gaskets are typically made from softer materials, such as rubber or cork, and fill the space between two surfaces. On the other hand, O-rings are constructed of tougher materials like elastomers or plastics and can fit into a groove on one of the surfaces.

Advantages of using Gasket

Using a gasket for your application has the following advantages:

• Used to seal two surfaces together, such as the lid of a jar and the jar itself.
• It can conform to irregular surfaces, which makes them ideal for sealing surfaces that are not perfectly flat.
• More tolerant of temperature extremes and can withstand higher pressures.

Advantages of using O-Ring

O-rings may also be helpful in sealing applications:

• Used to seal around a shaft or pipe, preventing fluid or gas from leaking through the opening.
• It provides a better seal on flat surfaces and is less likely to leak.
• More resistance to chemicals and abrasion makes them a better choice for applications where these factors concern.

Similarities of Gaskets and O-Rings

• Gaskets and O-rings are both types of seals that prevent fluid or gas leaks.
• They are produced in various materials, including rubber, metal, and plastic.
• Both are also available in various sizes to fit different applications.

Difference between Gaskets and O-Rings

Gaskets and O-rings are seals often utilized in many applications. However, there are several distinctions between the two when deciding which one to use:

The material used for the creation

Gaskets are usually made from paper, cork, rubber, or metal and fill the space between two surfaces, while O-rings are circular seals made from elastomeric materials such as silicone, FKM, or EPDM.

Their use and application

Gaskets prevent leakage between two mating surfaces that are not perfectly flat. In contrast, O-rings seal between two surfaces that are in close contact with each other.

Sealing method

One key difference between gaskets and O-rings is the way they seal. Gaskets rely on a tight fit between the gasket and the mating surface. Meanwhile, O-rings seal by compressing to fill any gaps between the two surfaces. Gaskets are also more likely to leak over time as the materials degrade and the gasket loses its shape, unlike O-rings, which are more resistant to degradation and can provide a longer-lasting seal.

Cost

Another key difference is the cost. Gaskets can be cheaper to produce than O-rings, but they are also more likely to need to be replaced more often. In contrast, O-rings can last longer and provide a more reliable seal, but they can also be more expensive to purchase.

Consider the application and desired results when choosing between O-rings vs. gaskets. Selecting gaskets over O-rings depends on the application.

Experts in gasket and O-ring seals

When choosing between gaskets and O-rings, it is essential to consider the specific needs of your application. If you are unsure which type of seal is best for your needs, consult with us now to find the right solution for your application!