Today we’re going to talk about gaskets and seals. These terms are generally used interchangeably. After all, gaskets seal a joint…so they’re the same, aren’t they?


Gaskets vs. Seals


The terms “gaskets” and “seals” are often used interchangeably. The fundamental difference is that a gasket is a physical piece that goes between two flanges to create a seal at a joining point between two components. A gasket is a seal. “Seals” is a category that encompasses many types of seals. In addition to gaskets, there are rotary seals, O-ring seals, liquid sealants, mechanical seals, shaft seals, valve stem seals, and packings, just to name a few.


Seals are generally moulded or machined product, often flat and round such as an O-ring. Gaskets are cut into different shapes so that they fit the design and bolt spacing of a component.


Gaskets are used to seal two components or flanges that have a flat surface. Seals are used to describe parts that are used between engine parts, pumps and shafts that rotate. Gaskets are used as static seals.


When a Seal is used between engine parts, pumps and shafts that rotate, it is described as a dynamic seal. Seals are required to keep leaks from occurring within a moulded or machined product.


When a gasket breaks down or a machine is serviced the gaskets need replacing. A seal within a bearing needs complete replacement of both the seal and bearing if there is a seal breakdown.


Now You Know


This has been a very general explanation of this topic, but hopefully it has provided some insight into a basic definition of sealing mechanisms. To sum up, a gasket is a seal, but a seal isn’t necessarily a gasket.


If you have any interest in gaskets and seals, I recommend that you can visit Chain Yeeh Industrial Co., Ltd. – the company specializes in kinds of rubber parts. Get more details about Chain Yeeh, please feel free to contact them at 886-4-865-3322.



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