1. High operational efficiency. The maximum total pressure efficiency of single stage and double stage working wheel is 92% and 83%, respectively, and the maximum total pressure efficiency of opposite rotation type is 85%, which is 20～30% higher than that of the original JF series local fan, and has obvious power saving effect.
2. Complete specifications, strong adaptability. The value of local fan air volume and total pressure have different combinations, the air supply distance is from 80m to 600m (the air supply distance can reach more than 1200 meters in series operation), which can meet the different needs of users.
3. Small volume, light weight, flexible and convenient movement. When its performance is basically the same as the JF series local fan, the volume is reduced by 20 ～ 30 and the weight is reduced by 20～30.
4. The noise is low. The noise of 1. 4 local fan measured in an empty mine does not exceed 86dB (A). If users have special requirements for the noise of local fans, our factory can match muffler, please explain when ordering.
5. The JK series of local fans are 2-pole motors with a rotational speed of 2860,2930r/min.