Common Problems with Centrifugal Fans — How Many Have You Encountered?

1. Sudden Increase in Centrifugal Fan Noise
A sudden increase in noise is usually caused by foreign objects entering the impeller and rubbing against the casing, or loose fixing bolts. It is recommended to stop the fan immediately and inspect it for maintenance.

2. Severe Motor Overheating
The main causes are bearing lubrication failure, bearing wear, or overload caused by abnormal airflow conditions. After shutdown, add proper lubricating grease to the bearings and check the air duct and fan interior for any blockages or foreign objects.

3. Belt Slippage and Abnormal Noise
Adjust the distance between the pulleys to increase belt tension. If the belt is aged or damaged, replace it with a new one directly.

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.”

Ali Rahman Maintenance Engineer, Power Plant – UAE

“The 4-72 series blowers from Dajing have been running non-stop in our cement production line for two years with zero breakdowns. Their team provided fast delivery and technical guidance during installation.”

Sergey Ivanov Production Manager, Cement Factory – Kazakhstan

“Our HVAC contractor switched to Dajing’s products for a recent government building project. The energy efficiency and build quality exceeded expectations. Definitely a long-term partner.”

Mohamed Al-Farid HVAC Project Supervisor, Government Contractor – Saudi Arabia

“We ordered customized GY4-73 induced draft blowers for our boiler system. Dajing’s engineers adjusted the impeller size precisely to our parameters — performance and after-sales support were outstanding.”

Nguyen Thanh Binh Technical Director, Thermal Equipment Co. – Vietnam

FAQ's

Didn’t find the answer you were looking for?
Contact our engineering team for a customized solution.

How can I choose the right blower model?

Our engineers will recommend the suitable blower type based on your air volume, pressure, temperature, and working conditions.
You can also send your technical parameters or drawings directly for evaluation.

What certifications do your products have?

All Dajing blowers are ISO9001 and ISO14001 certified.
Depending on customer needs, we can also provide CE, EAC, or other international compliance certificates.

Do you provide customized solutions?

Yes. We offer fully customized blower systems to meet special environmental or industrial requirements, including high-temperature, dust-removal, and corrosion-resistant designs.

What’s your delivery time?

Generally 7-15 working days after receiving the deposit, depending on the order quantity and customization level.

Do you offer after-sales service?

Yes. We provide online technical guidance, spare parts supply, and on-site service if required.
Our goal is to ensure your blower operates efficiently throughout its service life.