... from 28000 to 44500 cmh speed:450 to 520r/min Motor rotation speed:1400r/min Parameter Fan Itemgreenhouse fan1380 (50') ... , anti-corrosionfor ten year. 3. multi-protection energy saving motor protect against open-phase,overcurrent,overload.the use of high ... international standard,perfect electromagnetic design, IP55 and E class make motor save 10% energy 4. with American GATES Belt. 5. import rolling ...