Should the eccentric reducer at the inlet of a centrifugal pump be installed with its flat surface facing up or down? Why?

2020-07-09View Original

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Should the eccentric reducer at the inlet of a centrifugal pump be installed with its flat surface facing up or down? Why?

Reply #22020-07-09

Take some time to review the unit piping design in the chemical process manual; generally, when the inlet is horizontal, an eccentric reducer is used, so that the flow enters horizontally at the bottom of the pump and horizontally at the top of the pump； It mainly prevents gas from entering and causing cavitation.

Reply #32020-07-09

HG/T 20549.5

Reply #42020-07-10

The upper surface should be level when suction is applied, and the lower surface should be level when backflow occurs; this is mainly to prevent gas from accumulating at the pump inlet and causing erosion

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