This product has complete protection devices and is equipped with a ventilation and power transmission interlocking device. It can automatically transmit power after reaching the specified ventilation time, and has low-voltage automatic alarm and automatic 1, Zone 1, Zone 2. Shanghai Kaiwei Intelligent Technology (Group) Co. was founded in 2004 and headquartered in Shanghai. The company has professional R & D institutions, perfect. Purging and pressurization is an explosion protection method (Ex p) that uses compressed air or inert gas to eliminate and prevent hazardous substances such as gas, dust, or a combination of the two, from entering the enclosure and causing a fire or explosion. Specifically, the control system within the explosion-proof control cabinet works in. Widely used in petroleum, chemical, natural gas, coal, aerospace, shipbuilding, ocean, military, fire protection, electronics, railway, metallurgy, medicine and other industries. Tengda Explosion-proof Technology Co. is a large enterprise specializing in the research and development, design. It is widely used in flammable and explosive gas environment such as oil exploitation, refining, chemical industry, offshore oil platform, oil tanker, etc.