Chemical industry process will produce some harmful gas,  high temperature smoke exhaust fan, smoke anti-corrosion fan, in order to maintain safe working condition, Hengtong blower to remove harmful fume from an area or manufacturing process, depending on how corrosive the fumes are, our fans are designed and constructed with corrosion-proof alloy or spraying anti- corrosion coating. as well as coatings to keep high efficiency and long lasting quality.