| 摘要 |
A vertical turbine pump of the type including a diversion of flow of pumped fluid to lubricate shaft bearings in the pumping section, in which a venting of the lubricating flow to the tank is carried out in a multiple stage venting through successive vent pipes in a vertical series of vent housing sections installed above the pumping section. A cascade venting flow thereof is enabled to insure that a pressure build up at a point of venting is occurred, eliminating the need for mechanical sealing of the drive shaft for high pressure systems.
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