BDL - 220 v series explosion-proof electric bell Scope of applicationZone 1, zone 2 dangerous places;2 Ⅱ A, Ⅱ B, Ⅱ C 1~T6 group explosive gas or steam environment;3 indoor, outdoor (IP54).Technical characteristicsThe 1 enclosure is made of casting aluminum alloy, surface spray, beautiful appearance;The 2 cylindrical flameproof surface, good explosion-proof performance, safe and reliable;3 steel ...