Prevention and control of surge in centrifugal fans
Time:Apr 21st, 2026
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Surging in centrifugal fans is an unstable phenomenon that causes periodic fluctuations in flow rate and pressure. It generates intense vibration and noise, reduces operational efficiency, damages components, and can trigger system failures.
The onset of surging is closely related to the fan's operating point, the characteristics of the piping network, and the fan's own performance characteristics; surging is particularly prone to occur when the operating point approaches the surge zone.
Preventive Measures
1. Appropriate Selection
Ensure that the selected fan model is properly matched to actual operational requirements, thereby preventing the operating point from entering the surge zone.
2. Installation of Anti-Surge Devices
Examples include surge alarms, control valves, and similar mechanisms.
3. Piping Network Optimization
Improve the resistance characteristics of the piping network to minimize pressure fluctuations to the greatest extent possible.
4. Regular Maintenance
Consistently maintain the fan in optimal operating condition, and conduct thorough inspections of components—such as the impeller and bearings—to check for signs of wear.
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