Industrial filters, Shanxi Runtong environmental (Certified), Taiyuan, Shanxi filter is provided by Run-Environmental Engineering Limited. Run-Environmental Engineering Co., Ltd., Shanxi (www.sxruntong.com) is specialized in the "sewage treatment, waste gas treatment, dust handling" of the enterprise, the company adhering to the "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: generation manager. Shanxi Runtong Environmental Engineering Limited was founded in 2005, is a professional sewage treatment, waste gas treatment, dust handling and other types of environmental projects and research and design of high-tech enterprises. Filter by tube, stainless steel strainer, the sewage part, gearing and electric control parts. Filter work, when the water to be filtered from the inlet into the filter, flows through the filter, through the outlet duct to be entered by the user for process circulation, water is trapped in the particulate filter internal acrobatics. This constant cycle of trapped particles down more and more, the filtration rate more slowly, while imports remained steady flow of sewage into the filtration hole will become smaller and smaller, so the intake, resulting in pressure between the outlet poor, when anti-conservative difference when the filter reaches the set value, the differential pressure transmitter will transmit electrical signals to the controller, the control system startup drive motor shaft driven by the drive assembly, while the outfall opened, discharged from the outfall single bag filter, when the filter cleaning is completed, the pressure drops below the minimum, the system returns to the initial filter-like, system uptime. Development of a prototype air filter is an air filter for respiratory protective device to protect people breathing use. According to records, as early as the first century Rome, when people purifying mask on the use of mercury for protection made of hemp. In the long time after this, the air filter is also made progress, but mainly as a respiratory protective device for some dangerous profession of hospital sewage filter, such as the production of harmful chemicals. 1827 Brown discovered the movement of tiny particles, people have a better understanding of the mechanism of the air filter. The rapid development of air filters is the development of military industry and electronics industry closely related. During World War I, due to various chemical agents used to asbestos fiber filter paper as a military gas mask filter the smoke layer came into being. Glass fiber filter media for air filtration in October 1940 patented in the United States. 1950s, the US glass fiber filter paper production process conducted in-depth research, the air filter has been improved and developed. 1960s, HEPA filters come; 70s, using a fine glass fiber filter paper as the filter media HEPA filters for 013 micron size particle filtration efficiency of up to 99.9998%. Since the eighties, with the emergence of new test methods, the use of filters to improve and enhance the performance requirements of the evaluation found that the HEPA filter there is a serious problem, so he produced a higher performance ULPA filters. States are still trying to study, it is estimated there will soon be more advanced air filters.