| With their opposing surfaces, the seal face and the counter ring
form the sealing gap. The term "seal face" is
always used for the spring-backed component, "counter ring" for the component
without spring backing. Rotating and stationary designs of both ring components are
possible, because a mechanical seal's spring backing can be
fitted to rotate or to be stationary. Special mechanical seal designs, in which both rings
feature spring-backing, are generally variations of a basic design with spring-backing on
just one side. In this case the counter ring is the one to receive its spring-backing
"subsequently". |
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