Polyurethane rigid foam is referred to as polyurethane rigid foam, ie PU. It is a mixture of two kinds of chemical raw materials (A material, B material) and chemically reacted to form a rigid foam. A material - organic isocyanate, B material - polyol (polyether polyol) plus blowing agent, catalyst, flame retardant and the like. The A and B materials are pressurized and heated by the foaming machine, and sent to the mixing chamber of the spray gun through the insulated pipe to be mixed, and sprayed on the surface to be insulated with compressed air to form a rigid foam body. Energy conservation is a major concern of people all over the world. China's building energy consumption accounts for 47% of total energy consumption. The state has issued a national policy of 50% mandatory for building energy conservation and 65% promotion and application. The state has promulgated and started to implement the “Regulations on Energy Conservation Management of Civil Buildings†and “Public Building Design Standardsâ€. The recently issued “Medium and Long-Term Special Plan for Energy Conservation†stipulates that new buildings must strictly implement energy conservation standards during the 11th Five-Year Plan period, and existing buildings should be gradually implemented. Implement energy-saving renovation. Polyurethane is currently the best insulation material, and its performance indicators are superior to traditional XPS and EPS external insulation systems. This kind of external thermal insulation system technology has received the attention of relevant leaders and experts from various provinces and cities. The Science and Technology Department of the Ministry of Construction has set up a working group for the promotion of polyurethane building applications. In mid-October this year, the “International Conference on Energy-saving Application Technology for Polyurethane Walls†was held in Beijing, and the construction departments (construction committees) of all provinces, municipalities, autonomous regions and municipalities directly under the Central Government. Nearly one hundred representatives from the Science and Technology Department's energy-saving wall reform and design and development units participated. Dr. David Evans, an international building energy expert, told reporters that polyurethane materials are currently the best performance insulation materials in the world. Hard polyurethane plastics have light weight, low thermal conductivity, good heat resistance, ageing resistance, and easy to use. The material is bonded and burned without producing excellent properties such as droplets. In developed countries such as Europe and the United States, about 49% of building insulation materials are polyurethane materials, while the proportion in China is less than 10%. For this reason, the Ministry of Construction will promote polyurethane materials as a substitute for traditional building insulation materials from this year. At present, many provinces in China have applied this technology to more than 200,000 square meters. Xinjiang, Jilin, Heilongjiang and other provinces have formulated the technical specifications and design standards for this technology. Therefore, the building energy-saving situation is urgent, and it is imperative to promote the application of polyurethane exterior insulation system technology. Sleeved plug valves are used for on/off and throttling service in corrosion process with media temperature , such as chemical industry, Sleeved plug valves are non-lubricated valvequarter turn valve that achieve sealing through the use of a compressible sleeve as a sealing member. The valve size is from 1/2" to 30" with matching valve pressure from class 150 to class 600. Valve material can be carbon steel, stainless steel, allou steel, duplex steel etc. Sleeved Plug Valve,Manual Standard Plug Valve,Soft Seal Sleeved Plug Valve,Stainless Steel Plug Valve Yongjia South Trading Co.,Ltd , https://www.n-lvalve.com