Hunan KeenSen Technology Co., Ltd., established 2008 in Changsha, Hunan Province, China. Specializes in R&D, production, sales and application services for reverse osmosis and nanofiltration membranes, membrane elements and membrane treatment systems. National high-tech enterprise and national-level specialized “little giant” enterprise. Automated production line with annual capacity of 23 million square meters of membrane sheet (as of 2023). Over 100 product specifications, NSF certified, 51 invention patents. Products applied in over 100 countries covering seawater and brackish water desalination, wastewater near-zero discharge, reclaimed water reuse and material concentration/separation.