PP4-72A polypropylene centrifugal fan series The PP4-72 polypropylene centrifugal fan is made of polypropylene plate and heating die according to the metal 4-72 performance parameters. It is widely used in research, chemical, metallurgy, electronics, medicine, textile, instrumentation, electroplating, mining, school hotels, hotels, laboratories, environmental protection equipment and other industries for ventilation and ventilation to eliminate harmful gases such as acid and alkali. . However, it is not allowed to transport a corrosive gas such as a halogen derivative containing an aromatic compound, an aliphatic or an aromatic hydrocarbon, or a ketone. It has the characteristics of chemical corrosion resistance, aging resistance, small specific gravity, low mechanical vibration, low noise and stable operation. The gas to be transported is not allowed to contain viscous substances, dust and hard particles ≤150mg/m3, gas temperature 50°C, relative humidity ≤100%. And avoid sun exposure, there must be no heat source near the fan site.