First, the scope: an explosive gas mixtures dangerous places: Zone 1, Zone 2. 2, explosive gas mixtures: ⅡA, ⅡB, ⅡC. 3, proof mark: ExeⅡ Second, product characteristics: 1, cast aluminum housing, powder coated. 2, the structure forms, easy to install. Third, the main dimensions and installation form: four: Model meanings: Explosion-proof box threading threading box threading Explosion box Model: BHC- □, can replace: BHC-, YHXe-, BG-, BCH- explosion threading box Scope: 1.1 Zone 2 explosive atmosphere. 2.20 Zone 21 and Zone 22 combustible dust. Explosion-proof box threading Product Features: 1. Aluminum alloy shell, surface spray, beautiful appearance 2. The structure forms, user-friendly installation 3. explosion threading box sealed structure, waterproof, dustproof 4. explosion. threading box accord GB3836-2000, IEC60079, GB12476.1-2000, IEC61241 standards. 5. proof mark: Exe II 6. protection: IP55