4級隔爆型電動機YBDF2-312-4

YBDF系列電動機的防爆標志為Exd ⅡBT4，適用于工廠Ⅱ類、B級電氣設備，溫度組別為T1、T2、T3、T4組爆炸性氣體混合物存在的環境。根據訂貨要求，也可為用戶生產防爆標志為Exd的電動機。 

YBDF2防爆閥門電機型號：YBDF2-111-4、YBDF2-112-4、YBDF2-121-4、YBDF2-122-4，YBDF2-211-4，YBDF2-212-4，YBDF2-221-4，YBDF2-222-4，YBDF2-231-4，YBDF2-223-4，YBDF2-232-4，YBDF2-311-4，YBDF2-312-4，YBDF2-321-4，YBDF2-322-4，YBDF2-411-4，YBDF2-412-4，YBDF2-421-4，YBDF2-422-4，YBDF2-431-4。
YBDF-WF防爆閥門電機型號：YBDF-WF-111-4、YBDF-WF-112-4、YBDF-WF-121-4、YBDF-WF-122-4，YBDF-WF-211-4、YBDF-WF-212-4，YBDF-WF-221-4，YBDF-WF-222-4，YBDF-WF-223-4， YBDF-WF-231-4，YBDF-WF-232-4，YBDF-WF-311-4，YBDF-WF-312-4，YBDF-WF-321-4，YBDF-WF-322-4，YBDF-WF-411-4，YBDF-WF-412-4，YBDF-WF-421-4，YBDF-WF-422-4

YBDF-WF為戶外防腐隔爆型電動機，適用于使用在石油、化工中外易腐蝕、易爆的場所和相應的電動裝置組裝后，具有隔爆性能。