Page 199 - Know and Understand Centrifugal Pumps
P. 199
Know and Understand Centrifugal Pumps
Fiaure 13-1
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Fiqure 13-2
History
The mechanical seal was developed at the beginning of the last century.
Its development coincided with the invention of the steam turbine, the
dynamo and the electric motor.
In 1919, there was a patent on a mechanical seal showing spring
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