Explosion-proof, explosion-proof electrical equipment inside a structure, explosion-proof type of device is to ignite an explosive gas mixture may be part of all enclosed in a shell, sales damper, the shell can withstand any joints or through the housing structure gaps, penetrate into the interior of the shell combustible mixture in an internal explosion without damage, Yili fire dampers, and does not cause external light from one variety of gas or vapor to form explosive environments (see GB 3836 2 standard). The cause sparks, arcs and dangerous temperature components are placed in a flameproof enclosure, flameproof enclosure makes the device internal space separated from the surroundings. Flameproof enclosure gap, respiration and electrical equipment due to gas permeation, so there may be an explosive gas mixture inside, when it exploded, the housing can withstand the pressure generated by the explosion without damage, the flue damper, while housing construction gap flame can be cooled, reduce the flame propagation velocity or acceleration chain termination, flame or dangerous flame proof product can not cross the gap to ignite the external explosive atmosphere, so as to achieve the purpose of explosion. Flameproof "d" according to its environment allows the use of the type of explosive gas into class I and IIA, IIB, IIC class. The device is suitable for the type of protection zone 1, 2 places. Type of protection: Ex d; Explosion levels: ⅡB; maximum surface temperature: T4 135 ℃; ambient temperature: -20-60 ℃ Humidity: 89% ± 25 ℃; use zones: Zone 1, Zone 2; Environment: gas; Protection class: IP65. The company mainly produces various kinds (of board blue method, angle iron flange) air flow control valve, fire control valve, smoke dampers, multi-leaf smoke vents, pressure delivery outlet, plate discharges, aluminum outlet, ABS outlet, casual flow, from one hundred vertical outlet, waterproof louvered vent, muffler, HIP me, spiral duct, common duct board, without moving hood, tin production and installation of ventilation ducts. Operating various types of blowers, fans, ventilation fans, air curtain, purifiers, smoke damper, all kinds of hoses, rubber tubes, stainless steel pipe and other central HVAC ancillary products. One use of the product is the exhaust port of the exhaust valve and the module cancel, vent louvers into a single layer; second method is to put a normally closed damper on each electric charge of the smoke changed to normally open 280 degrees Close the damper, control module replaced general monitoring module. Both methods achieve the same fire code requirements, and actual control is also very reliable. Damper specifications, Rui Xincheng air conditioning (online consultation), Ili damper is provided by the Texas Air Conditioning Equipment Co., Ltd. Rui Xincheng. Rui Xincheng Texas Air Conditioning Equipment Co. (www.dzrxckt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Rui Xincheng air conditioning in leadership with the staff warmly welcome all inquiries negotiations to create a better future Rui Xincheng air conditioning.