First, the scope: an explosive mixture of gases hazardous location: Zone 1, Zone 2. 2, an explosive gas mixture: ⅡA, ⅡB. 3, temperature class: T1 ~ T6. 4, explosion-proof mark: ExdⅡBT4 Second, product characteristics: 1, cast aluminum housing, powder coated. 2, cable wiring. ■ installation, use and maintenance. Should be checked prior to installation of basic data listed on the product nameplate in line with the actual conditions of use. Product should be grounded. Regardless of wiring devices shall introducing pressure seals. . After level power must be cut off before opening the lid during maintenance. Introduction device seals and rubber mats are made of oil and rubber manufacturing 3001, users in the use and maintenance of aging process, if found should contact the manufacturer to order, and to ensure the timely replacement of explosion-proof performance. In flameproof surface evenly coated with anti-rust oil 204-1 after put into use. Ambient temperature is -20 ~ + 400C. Ambient air relative humidity less than 95%. In a significant shake and out of the place without vibration. Pollution levels for three. No damage to the metal and insulation corrosive gases or steam