YBDF系列电动机的防爆标志为Exd ⅡBT4,适用于工厂Ⅱ类A级、B级电气设备,温度组别为T1、T2、T3、T4组爆炸性气体混合物存在的环境。根据订货要求,也可为用户生产防爆标志为Exd的电动机。其他型号有:YDF2-122-4 YDF2-211-4 YDF2-212-4 YDF2-221-4 YDF2-222-4 YDF2-231-4 YDF2-311-4 YDF2-312-4 YDF2-321-4 YDF2-322-4 YDF2-411-4 YDF2-421-4 YDF2-422-4 YDF2-431-4 防爆电机型号:YBDF2-122-4,YBDF2-211-4,YBDF2-212-4,YBDF2-221-4,YBDF2-222-4,YBDF2-231-4,YBDF2-311-4,YBDF2-312-4,YBDF2-321-4,YBDF2-322-4 ,YBDF2-411-4,YBDF2-421-4,YBDF2-422-4,YBDF2-431-4,YBDF-WF-212-4,YBDF-WF-221-4,YBDF-WF-222-4,YBDF-WF-231-4,YBDF-WF-311-4,YBDF-WF-312-4,YBDF-WF-321-4,YBDF-WF-322-4,YBDF-WF-411-4,YBDF-WF-421-4,YBDF-WF-422-4 。