Pump Flow Fluctuation: Causes, On-site Remedies, and Preventive Measures

Nov,06,2026

The pump output flow fluctuates between high and low, process parameters become unstable, and in severe cases it can directly cause production downtime. Before inspecting the interior, be sure to close the air inlet valve and release pressure. If conveying acid, alkali, or corrosive chemical liquids, first flush the interior of the pump with water to avoid liquid splashing and causing injury when disassembling the pump.

Cause Analysis

  • Fluctuating and unstable input air supply pressure
  • Blockage in the conveying pipeline, improper valve opening adjustment
  • Worn internal pump parts

On-site Handling Methods

  • Check the air supply pressure and maintain it within the equipment's rated working range.
  • Clear the blockage points in the pipeline and confirm that the valves are in the correct open/closed state.
  • Inspect and replace worn parts, focusing on the diaphragm; if severely worn, replace the diaphragm.

Daily Preventive Recommendations

  • Install a pressure stabilization device on the air supply to stabilize the supply pressure.
  • Regularly clean and maintain the entire pipeline system.
  • Establish routine flow inspections to detect abnormalities early.

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