Gasket vs Seal: What’s the Difference?

If you find yourself in a predicament wondering whether you should use a gasket or seal, it’s important to know their respective differences. While you may think they are interchangeable, they each have unique properties that make them advantageous depending on the situation. 

Gasket vs Seal:

 What’s the Difference?

So, gasket vs seal: what’s the difference? Below you will find helpful information to help guide you when you need to decide between using a gasket or a seal.

An Introduction to Gaskets

While it is very true that there are similarities between gaskets and seals, there are also some unique differences. So, what is a gasket? A gasket is a seal connection between two different parts that have flat surfaces. A seal, on the other hand, is used between rotating parts, such as an engine, pump, or shaft. Therefore, gasket seals are used in scenarios where a static seal is necessary. They are most frequently used when a connection requires preventing leaks. 

Gaskets are commonly used in industries such as oil and gas, electric generation, pulp and paper, and transportation. They are made from a variety of materials, including Viton, Neoprene, Nitrile, Pure Gum Rubber, and SBR. These are just a few of the different materials used for gaskets so be sure the type you choose meets your needs. When it comes to replacing gaskets, it should be done any time the equipment is taken apart and reassembled. This means you’ll need an entirely new gasket as this can ensure their effectiveness, in addition to maintaining safety.

An Introduction to Seals

Seals are used in machines, engines, pumps, or shafts that rotate. Unlike gaskets, seals are a little more dynamic in terms of their function. Seals are often a molded or machined product that is cut into dynamic shapes to perfectly fit into the component parts. Seals are also slightly more complex than gaskets as they have an outer ring and an inner surface. The outer ring is metal and is right over the inner surface made of rubber. The inner circle is slightly tilted and creates a lip for the seal as they fit perfectly within one another. The inner circle is designed to serve as a second barrier against any liquid that can get past the outer ring. It serves as a safeguard and requires proper installation. If it is not placed in the outer ring correctly it can cause major issues.

Seals are commonly used in hydraulic lines and ball bearings. They not only keep out leaks, but can also reduce the amount of noise that occurs during operations using ball bearings. They are fairly easy to install as they are fitted into the hole by a press. Then, they are tapped further in using a hammer. To keep the crankshaft from damaging as the seal moves through it, lubrication is necessary. In terms of replacement, the entire bearing must be replaced when a seal breaks down. Avoid a rookie mistake and replace the entire bearing. Just replacing the seal can result in major damage and potential safety issues. 

Specialty Seals

In many ways, gaskets and seals are similar. However, their unique differences make it important to understand which one is right for your needs. The most notable difference is that a gasket is meant to seal a static connection, while a seal is meant to seal a connection between two different rotating parts. If you need help determining which is right for your project, contact the experts at Real Seal. They are skilled in specialty seals, and manufacture and distribute seal products and mechanic component goods. Check out their website today for more information!