Precautions For Installation Of Inlet Position Of Pipeline Centrifugal Pump Inlet Pipe

Mar 27, 2025

(1) The distance between the inlet of the centrifugal pump inlet pipe and the bottom and wall of the inlet pool is less than the diameter of the inlet. If there is sediment and other pollutants at the bottom of the pool, and the distance between the inlet and the bottom of the pool is less than 1.5 times the diameter, it will cause poor water intake or suction of sediment and debris during pumping, which will clog the water gate.

(2) When the water inlet of the inlet pipe is not deep enough, it will cause vortices on the water surface around the inlet pipe, affecting the water intake and reducing the water output.

Installing a pipeline centrifugal pump with its inlet directly connected to the elbow will result in uneven distribution of water flow entering the impeller through the elbow. When the diameter of the inlet pipe is larger than that of the water pump inlet, an eccentric variable diameter pipe should be installed. The eccentric variable diameter pipe should be installed flat on top and slanted on the bottom. Otherwise, the air will gather, the water output will decrease or the water cannot be pumped out, and there will be collision sounds. If the diameter of the inlet pipe is equal to that of the water pump inlet, a straight pipe should be added between the water pump inlet and the elbow, and the length of the straight pipe should not be less than 2-3 times the diameter of the water pipe.

There are many bends on the inlet pipeline of the centrifugal pump: if too many bends are used on the inlet pipeline, it will increase local water flow resistance And the elbow should turn in the vertical direction, not in the horizontal direction, to avoid gathering air.

When installing the inlet pipeline of a centrifugal pump in a pipeline, the horizontal section should be horizontal or upward curved: this will cause air to accumulate in the inlet pipeline, reduce the vacuum degree of the water pipe and pump, lower the suction head of the pump, and reduce the water output. The correct approach is that the horizontal section should be slightly inclined towards the direction of the water source, not horizontal, let alone upward.