Primary and secondary fans: definition, application, and performance differences

In the industrial field, fans are important equipment used to transport gases and increase gas pressure. According to its working principle and performance characteristics, fans can be divided into primary fans and secondary fans. So, what are primary and secondary fans? What are the differences between them?

A primary fan, as the name suggests, refers to a fan with only one impeller. Its working principle is to suck in and pressurize gas from the inlet through the rotation of the impeller, and then discharge it from the outlet. The structure of a primary fan is relatively simple, with low manufacturing costs, and is suitable for situations with low flow requirements and low pressure.

A secondary fan is a fan composed of two or more impellers connected in series. After being pressurized by the first impeller, the gas will enter the next impeller for further pressurization, thereby achieving higher pressure output. The structure of the secondary fan is relatively complex and the manufacturing cost is high, but it has high pressure and flow rate, making it suitable for occasions with high requirements for gas pressure and flow rate.

In addition to differences in structure and working principle, primary and secondary fans also differ in their application fields. Primary fans are widely used in fields such as ventilation, air conditioning, and refrigeration; And secondary fans are more commonly used in industrial production, mining and other fields to meet the higher requirements for gas pressure and flow rate in these areas.

In summary, there are significant differences in the definition, application, and performance between primary and secondary fans. When selecting a fan, the appropriate type of fan should be chosen based on actual needs and operating conditions to achieve optimal performance and economic benefits.