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When the Mechanical Seal is replaced,
the shaft is sealed at two points. In addition to the
locking seal an "O" ring
seal just inboard from the seal is engaged. This
minimizes product loss during seal change and acts as a backup
for the main locking seal. The Mechanical seal area is
completely enclosed for protection from rain, dust, freezing
temperatures and other undesirable conditions. A
drain hole is provided for seal leak detection.
Should complete seal failure occur,
product loss is restricted by the shaft end bearing and by
two additional close clearance rings.
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