... efficiency & reliability 3.Easy for motor installation 1.YKK,YRKK serial motor can be used to drive compressor,vent fan,pump ... ,coal miller and other general purpose machinery.2.YKK,YRKK serial motor is 50hz, Fclass insulation,clock wise rotate direction(View ... made as CCW motor based on customer requirement. YKK,YRKK serial middle/high voltage motor