When it comes to negative pressure fans, we are all very familiar with it. It is a common ventilation equipment in our daily life. It not only has a good ventilation effect, but also is economical and practical. With the increase of demand, now the types of negative pressure fan also become multifarious, so Hongfeng negative pressure fan will teach you how to classify the negative pressure fan.

1. negative pressure fan according to the use of material classification can be divided into several types, such as iron fan (ordinary fan), glass steel, plastic fan fan, blower fan, aluminum and stainless steel etc.

According to the direction of gas flow, 2. fans can be classified into centrifugal type, axial flow type, oblique flow type (mixed flow type) and cross flow type.

According to the flow direction of air flow into the impeller, the 3. fan is divided into axial flow fan, centrifugal fan and oblique flow (mixed flow) fan.

4. fan divided by use of pressure into the local fan (hereinafter referred to as the press type fan) and flameproof motor is arranged in the outer or in the passage, across the withdrawable part fan motor is arranged in the sealing cavity of the explosion proof (hereinafter referred to as the exhaust fan).

5. fans can also be divided into single-stage, two-stage or multi-stage pressurization fan in the form of pressurization. For example, 4-72 is single-stage pressure, and the high fan is multistage compressor fan

According to the use of 6. fans can be divided into: axial fan, mixed fan, roof fan, air conditioning fan and so on. Fan

7. fans can be divided into low pressure fan, medium pressure fan and high pressure fan according to the pressure

8. according to the export pressure (boost) is divided into: ventilator (less than 15 thousand Pa), blower (1.5 ~ 350 thousand Pa), compressor (over 350 thousand Pa).