The main components
Moving ring, static ring, cooling device and compression spring (depending on the specific equipment).
Auxiliary seal
Sealing ring (O-shaped, X-shaped, U-shaped, wedge-shaped, rectangular flexible graphite, PTFE-coated rubber O-ring, etc.).
Elastic force compensation mechanism
Spring, push ring.
Spring seat and key or various screws.
Classification
Divided into single end face, double end face; balanced type, unbalanced type; arbitrary rotation direction, fixed rotation direction...
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