... against swing. 3.Certification: CE CBL series explosion-proof centrifugal fan GeneralCBL series marine explosion-proof centrifugal fan is ... frequency 50Hz, 380v or 60Hz, 440v, YB-H series flameproof Marine threeophase asynchronous motor.Working conditions1. II B ... drive group, elastic coupling, motor, etc. Drive group of bearing body, bearing, axis, copper ring, packing, etc: can temperature ...