1, Koch
Koch offers different structures (hollow, coiled, tubular and plate) and different materials (PS, PVDF, PAN, PES, etc. ), the filtration accuracy is different (from microfiltration, ultrafiltration, nanofiltration to reverse osmosis), and the application standards are different. Products have been widely used in wastewater, industry, civil use, drinking water treatment, medicine, biochemical technology, food, dairy products, beverages, electrophoretic coating and other industries. Koch filter membrane products have become the representative of advanced production technology.
2. Qin Sen Hi-Tech
Established in March 2008, Qin Sen Hi-Tech is located in Changsha High-tech Development Zone (Lugu, China), which is a high-tech enterprise specializing in the production and application services of R&D, reverse osmosis membrane and nanofiltration membrane products. 20 10 the membrane production process and automatic production line imported from the United States have an annual production capacity of 3 million square meters of reverse osmosis membranes and nanofiltration membranes, which can be used to roll various industrial membrane modules and household membrane modules.
3. Han Shi movies
Han Shi membrane (CSM) refers to the product series of Jinxiong chemical water treatment and process solutions, including reverse osmosis membrane, ultrafiltration membrane, membrane bioreactor components and other products. Membrane separation technology refers to the selective separation of molecular mixtures with different particle sizes through semi-permeable membranes at the molecular level. Semi-permeable membrane is also called separation membrane or filter membrane, and the membrane wall is covered with small holes. According to the pore size, it can be divided into microfiltration membrane (MF), ultrafiltration membrane (UF), nanofiltration membrane (NF), reverse osmosis membrane (RO) and so on. Cross-flow filtration is used for membrane separation.
4. Dow Jones index
With its integration, market-driven and industry-leading business in the fields of special chemistry, high-tech materials, agricultural science and plastics, Dow provides a wide range of products and services to customers in about 180 countries and regions around the world, which are applied to rapidly developing markets such as packaging, electronic products, water treatment, coatings and agriculture. In 20 14, the annual sales of Dow Group exceeded 58 billion US dollars, with about 53,000 employees worldwide, and 20 1 factories in 35 countries and regions, with more than 6,000 products. As early as 1930s, Dow had already started its business in China.
5. American Hyde Energy Company
HYDRANAUTICS was founded in 1963, and its headquarters is located in seaside city, California, USA. 1987 was merged into nitto electric co., ltd, which is one of the wholly-owned subsidiaries of nitto electric co., ltd in the United States. Since 1970 entered the field of reverse osmosis water treatment, American Hyde Energy Company has always insisted on pursuing advanced production technology, the highest product quality and perfect customer service.
After 40 years of unremitting efforts, it has become one of the most famous reverse osmosis and nanofiltration membrane manufacturers in the world's separation membrane manufacturing industry, with the largest product specifications, the largest production scale and the largest number of patents. It is also the first reverse osmosis membrane manufacturer in the United States to pass ISO900 1 international certification.