Reasons Why Centrifugal Fan Pressure Suddenly Drops
🔥 Fan pressure suddenly dropping? Don’t rush to replace it!
90% of the time, it’s caused by these 4 reasons 👉
❶ Clogged or leaky ducting
Dust buildup in filters or elbows, or tears in flexible connections—pressure just “leaks out” 💨
❷ Loose belt or slow rotation
Belt slippage or motor phase loss—if the impeller doesn’t spin fast enough, pressure won’t rise
❸ Impeller damaged or rotating backward
Worn or deformed blades, or wrong motor wiring—if reversed, pressure can drop by half ⚠️
❹ High air temperature / low density
Hot summer intake air is lighter, so at the same speed, pressure drops
✅ Check rotation speed first, then ducts, and finally the impeller.
Customer Testimonials
Trusted by industrial partners across 30+ countries — real feedback from our global clients.
“We’ve been using Dajing’s 9-19 high-pressure centrifugal blowers for our dust removal system. The airflow performance is excellent, and the noise level is much lower than our previous models. Truly reliable quality.”
FAQ's
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Depending on customer needs, we can also provide CE, EAC, or other international compliance certificates.
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Generally 7-15 working days after receiving the deposit, depending on the order quantity and customization level.
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Our goal is to ensure your blower operates efficiently throughout its service life.