Causes of Pump Vibration

Pump vibration can be caused by a number of causes.  Many of these cause are related to the fluid
being handled and issues such as pressure fluctuations in the line.  These are called hydraulic causes.

The Hydraulic causes of pump vibration are

  • Operation the pump away from the Best Efficiency Point (BEP)
  • Turbulent flow in the lines
  • Fluid getting recirculated
  • Low Net Positive Suction Head Available (NPSHA)
  • Water Hammering

Mechanical Causes

  • Aligment between the pump and the motor
  • Unbalanced shaft
  • Loose parts and fitment
  • Vibration from other equipment nearby