Oil-filled part of the entire device or equipment within the oil invasion protective solution I l, so they can not point above the fuel surface or shell explosion outside atmosphere. Filling sand filling sand or other specified characteristics of the powder material in the shell, so that under the specified conditions, arcs or high temperatures generated by the shell can not ignite a surrounding explosive gas explosion-proof equipment such h airtight hermetic shell type . Ie explosive gas mixtures in the environment can not invade the device housing. Airtight shell with melted, extruded or adhesive sealing method, which is mostly non-removable enclosure to ensure permanent tightness. Type of electrical equipment to protect the environment. Life, luminous flux maintenance factor other geometric HID lamp is poor. Start, and then start the time than other HID lights for long proof lighting led, and is susceptible to the power supply voltage variations. Higher starting voltage proof lighting, special ballast to be used, but the Department of Sc-Na and Na-Tl-In system (low starting voltage type) are proof lighting 30w, will start assembly attached inside the bulb, using a mercury lamp ballast ( blocking coil mode, leakage transformer mode, etc.). led explosion-proof lighting | decade integrity Koretoyo Explosion | Wulanchabu Koretoyo explosion proof lighting by Zhejiang Electric Co., Ltd. Tianjin offices. Zhejiang Koretoyo explosion-proof electrical Ltd. Tianjin Office (#) (http://www.tjfangbao.com) is a professional "explosion-proof lighting, explosion-proof motors, explosion-proof distribution box, explosion-proof switch, explosion-proof junction box" company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "Koretoyo" brand has a good reputation. We adhere to the "service first, customers first" principle, so Koretoyo proof win the trust of customers in the congregation proof lighting, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you! You can also access (http://www.tjfangbao.com/supply_details_42544073.html), for more information about the company.