Horizontal multistage centrifugal pump inlet installation precautions

Posted by angroup on March 15, 2022
Horizontal Multistage Centrifugal Pump

Horizontal multistage centrifugal pump installation will involve the installation of the pump head, motor and piping, the process is very complex, if the installation of which link is not in place, may lead to horizontal multistage centrifugal pump unit in later operation can not fully play the energy efficiency, and in serious cases even can not work properly. Today, the technical team of An Pump Machinery to share the horizontal multistage centrifugal pump inlet installation considerations for user reference

multi-stage-pump
  1. When installing the water inlet road, its horizontal section needs to be slightly skewed to the water resources orientation, not horizontal, let alone upward, otherwise it will make the horizontal multistage centrifugal pump suction wet pump head lower, the water flow rate is reduced
  2. Inlet pipe road with more 90 degree elbow, if the inlet pipe road with more 90 degree elbow, will enhance part of the water friction resistance. And the bend should be in the vertical orientation bend, should not be in the horizontal orientation bend
  3. Large-diameter horizontal multistage centrifugal pump with small-diameter piping. Many people think that the large diameter horizontal multistage centrifugal pump with a small diameter water pipe can enhance the horizontal multistage centrifugal pump head. In fact, the actual pump head of horizontal multistage centrifugal pump = total pump head - missing pump head. When the pump model is determined, the total pump head is certain; the key to reduce the pump head comes from the pipe friction resistance, the smaller the pipe diameter is obviously the greater the friction resistance, so the greater the missing pump head, so reduce the pipe diameter, the actual pump head of the horizontal multistage centrifugal pump not only can not improve but also will reduce. Similarly, when a small-diameter horizontal multistage centrifugal pump with a large diameter water pipe, will not reduce the actual head of a horizontal multistage centrifugal pump but will reduce the missing pump head because the pressure of the pipe is reduced so that the specific pump head gradually improve. Small diameter horizontal multistage centrifugal pump with large diameter pipe, will certainly greatly increase the motor load, but if in the rated value of the pump head range, no matter how the pipe diameter to enhance the horizontal multistage centrifugal pump are able to all normal operation, but also to reduce the pipeline wear and tear, enhance the horizontal multistage centrifugal pump high efficiency.
  4. Horizontal multistage centrifugal pump inlet pipe and bend pipe immediately connected. Horizontal multistage centrifugal pump into the water pipe and bend immediately connected will make the water through the bend into the centrifugal impeller when the dispersion is not uniform when the inlet diameter exceeds the pump into the water pipe, should install a reducer. If the water inlet and horizontal multistage centrifugal pump into the same diameter of the water pipe, should be in the horizontal multistage centrifugal pump into the middle of the water pipe and bend pipe plus receiver, receiver length can not be less than three times the diameter of the water pipe
  5. Water inlet with pump bottom valve. The inlet pipe with a bottom valve should be installed vertically if it must be installed obliquely due to terrain limitation, the angle with the water surface should be more than 45 degrees, and the direction of the valve shaft pin should be in the horizontal direction, so that the bottom valve can not be closed or closed tightly, affecting the work of the pump.

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