Advanced designs incorporate axial-spiral design casing internals and fully recessed impellers
Vertical enclosed shaft-driven sump pumps are selected in many processes where safety and reliability concerns prompt the reliability-focused to question certain less-well-designed pumps. We now find vertical enclosed shaft-driven pumps applied in chemical, petrochemical, gas production, fuel storage and other industries. They are especially important in explosion-proof areas where only the best-engineered pumps merit closer consideration.
One such thoughtfully engineered pump design (Fig. 1) is comprised of a single-stage, end-suction "back-pull-out"-type casing. Its hydraulic end is located below the liquid level and connected to the motor by means of an extended shaft. This shaft is hous
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