Q: We have no data about the air quantity of the fan, can you give us some recommendations?
A: Yes, just let us know the tunnel diameter/length, and our engineer will design it for you.
Q : We want ventilation fans for our coal mine, is there anything we should pay attention to?
A: If using fans in a coal mine (especially underground), an explosion-proof motor and aluminum alloy impeller is necessary.
Q : What's the meaning of a double-stage fan? And what are the advantages?
A: double stage fan, means two sets fan used in series. Advantages: larger pressure, long air delivery distance, but the fan will be more compact.