The frame of AC fan is Durable-cast Aluminum ,and the impeller is PBT (Thermoplastic  black Ul-94-VO),There are two kind of bearing system: ball and sleeve. Clients can choose the bearing system according to their requirement. Jianzhun  fan widely applies to accurate apparatus,generating equipment,warm-air blower,electric welder. Before leaving factory, jianzhun fan is strictly tested(including dielectric strength,moisture-proof,cold resistance,thermostability,impact strength,longvity experiment,etc.)It can be used safely.

Motor:Shaded pole motor structure Frame:Black paint , Durable-cast Aluminum, Moisture and antisepsis proof Fan blade: PBT(Thermoplastic  black  Ul-94-VO) Bearing: High precision, long life NMB ball bearing；Low-noise imported sleeve bearing

Insulation:  B class   with 120 centigrade high-temperature resistance.
Insulating Electric Resistance:  over 500 mega-ohm
Withstand Voltage:Leaking current 0.5 mA, withstand voltage 1500V/minute.
Operating temperature:-10 centigrade to +70 centigrade
Storing temperature:-40 centigrade to +70 centigrade
Operating Voltage:115V（from 85V to 125V）
　　　　　           220V（from 185V to 245V）