Mechanical seal (mechanical seal) is defined as at least one rotation axis perpendicular to face compensation mechanism in the fluid pressure and stretch (or magnetic), and supporting the role of keeping under seal affixed to merge with the relative sliding and to prevent fluid leakage form Device. Elastic loading mechanism and the secondary seal is a metallic bellows mechanical seal which we call metal bellows seal. Sealed in the light, there are also used as an aid to sealing rubber bellows, rubber bellows stretch limited, generally need to meet the load supported by elastic springs.
 "Mechanical seal " usually been referred to as "mechanical seal. "

 Mechanical seal consists of:

 There are four main parts. a. main components: dynamic ring and stationary ring. b. secondary seals: seals (with O-shaped, X-shaped, U-type, wedge, rectangular flexible graphite, PTFE coated rubber O rings, etc.). c. elastic compensation mechanism: spring, pushing ring. d. Transmission Parts: Kei Block and key or playing a variety of screws.