What is a mechanical seal

Mechanical seal refers to a device that prevents fluid leakage by at least one stack of end faces perpendicular to the axis of rotation that are held together and relatively slid under the effect of elastic force (or magnetic force) of fluid and compensation mechanism and auxiliary seal. Metal bellows mechanical seal is a mechanical seal with a spring loaded mechanism and a secondary seal that is a metallic bellows. In light seals, people use rubber bellows as a secondary seal, but due to the limited resilience of the rubber bellows, springs are often required to support the loading spring force.
       Mechanical seal widely used rotary shaft seal devices, such as centrifugal pumps, centrifuges, compressors and other equipment. As the drive shaft penetrates both inside and outside the device, this can result in a circumferential gap between the shaft and the device through which media in the device can leak to the outside. If the inside of the device is below atmospheric pressure, air can enter the device, There is a seal to ensure sealing performance of the device. Many types of shaft seal devices, mechanical seals have the advantages of good sealing performance and long service life, so the mechanical seal is the most common shaft seal.

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