How does a static seal differ from a dynamic seal?

A static seal is designed to create a barrier between two stationary parts, effectively preventing the passage of fluids or gases where there is no relative motion between the components. These seals are commonly found in applications such as pipe fittings, gaskets, and flanges where a stationary connection is necessary to maintain system integrity under pressure.

On the other hand, a dynamic seal is specifically engineered to accommodate movement between parts that are in relative motion. This is crucial in applications such as pistons in engines or rotating shafts, where the seal must effectively maintain pressure while allowing for movement. The design of dynamic seals often incorporates features that can handle wear and adapt to changes in pressure and speed, ensuring a continuous seal despite the physical movement that occurs during operation.

The distinction between static and dynamic seals is fundamental to mechanical engineering, as it affects how systems are designed and how they function under various conditions. Understanding this difference is key for proper selection and application of sealing technologies in engineering designs.