Covna Group is one of the top manufacturers of industrial valves in China with 23 years' experience. STARK,Subsidiary of COVNA Group,Guang dong Stark Water Treatment Technology Co., Ltd. is a company that focuses on water treatment plant and is committed to the research and development, production, sales and after-sales service of environmentally friendly water purification industrial products. We are specialized in reverse osmosis equipment,ultrafiltration equipment,EDI electric desalination system,sea water desalination machine ,brackish water desalination machine,water filling machine and water treatment accessories like water filter,water softener,stainless steel tank and membrane shell,UV Sterilizer and ozone generator. Water treatment products are widely used in industries of electron,electroplating, power plants,pharmaceuticals,petroleum,chemical,food and beverage,printing and dyeing,etc.