The machines, which are used to suck gas, exhaust air, and compress gas, all can be called fan or blower.
The fan classification
1. According to different working principle, there are two categories, impeller type fan and displacement blower.
Impeller type fan includes centrifugal fan and axial flow fan. The displacement blower includes piston fan and rotary fan.
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| low pressure fan, medium pressure fan, high pressure fan |
2. According to different discharge pressure, there are 4 kinds fan.
A: Ventilation fan, discharge pressure is below 14.7 Kpa.
B: Air blower, discharge pressure is between from 14,7~ 300 Kpa.
C. Gas compressor, discharge pressure is over 300 Kpa.
D. Vacuum pump, this fan can produce vacuum over 50 Kpa. This machine is used to improve, produce, and keep the vacuum of some enclosure space.
3. According to air pressure, the impeller type fan can be divided into low pressure fan (air pressure below 1 Kpa); medium pressure fan (air pressure between 1~3Kpa), high pressure blower (air pressure 3~14.7 Kpa).
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| low pressure impeller, medium pressure impeller, high pressure impeller |
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