Dry powder fire extinguisher in the filling of dry powder extinguishing agent. Powder extinguishing agent is dry and easy flowing fine powders for fire fighting, fire-fighting effectiveness of having a small amount of additive salts and dried, crushed and mixed fine solid powder composition. It is a widely used fire extinguishing agent in fire protection equipment, and are mainly used in fire extinguishers. In addition to fighting metal fires special dry chemical extinguishing agent, powder extinguishing agent is generally divided into BC and ABC dry powder extinguishing agent into two categories. Such as sodium bicarbonate powder, modified dry sodium, potassium powder, dry ammonium dihydrogen phosphate, diammonium phosphate powder, phosphate powder and amino powder extinguishing agent. Powder extinguishing agent, mainly through mists action under the pressurized gas discharged into contact with the flame, physics, chemistry occurs when mixed fire: first by dry powder of inorganic volatile decomposition products, fuels and combustion process generate free radicals or reactive groups on chemical suppression and vice catalytic combustion chain reaction interruption fire; the second is by dry powder falls on combustible surface, the chemical reaction of fire equipment company, and at high temperature form a glassy coating layer of fire equipment manufacturers, in order to exclude oxygen, thereby suffocating the fire. In addition, there are some dilution of oxygen and cooling. Xi'an fire equipment connected to the water on the ground floor style, easy to operate, but susceptible to collision Xi'an fire equipment, easy to cold; good underground freezing effect, but need to build a large silo chamber, and the use of firefighters when going to the well connected water, the operation is not convenient. Outdoor fire hydrant usually buried telescopic below ground hydrant pushed back, pulled out the use of ground work. Style than on the ground to avoid the collision, freezing good effect; convenient than the underground operation, buried installation easier. Xi'an fire equipment, fire-fighting equipment in Xi'an, Shaanxi JW fire fighting equipment provided by the Fire Equipment Co., Ltd. Shaanxi Jiwei. Shaanxi Jiwei Fire Equipment Co. (www.jiweixiaofang.com) (www.jiweixiaofang.com) strong, credible, in other industries, Xi'an has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shaanxi JW firefighting equipment into the brilliant and you work for a better future!