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What is an explosion-proof fan? Where is it used?
2022-11-17
Explosion-proof fan is: used in inflammable and explosive gas places, to avoid some inflammable objects caused by safety accidents of the motor.
First of all, explosion-proof fan must use explosion-proof motor; Explosion-proof fan is used in the occasion of explosion risk, it has the characteristics of the fan required by the working condition, but also must meet the requirements of explosion-proof.
Secondly, the flow parts of the explosion-proof fan (impeller, volute, etc.) must be made of soft and hard material. Generally speaking, between the rotating parts and the fixed parts, there must be a soft and a hard to prevent the friction or collision between the parts when the fault occurs. The more common material matching is that the impeller blade, front plate, rear plate and blade rivet are 2A01 material of hard aluminum, volute using galvanized sheet.
If the impeller using duralumin material can not meet the strength requirements, can also use galvanized plate material impeller, and in the volute surface covered with a thin duralumin lining.
Explosion-proof fans are generally used in some dangerous environments, such as the transmission of dangerous gases, pressurization of liquid gas and so on. After the failure of fans, we must ensure that sparks will not be generated, causing secondary accidents to the equipment and environment. Therefore, it is required to install protective measures between the explosion-proof motor and the volute to prevent sparks caused by scratch, and different explosion-proof levels. The configuration is also different.
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