With more than 20 years development, Ningbo Yongzhong Valve Manufacturing Co.,Ltd., certified by ISO9001-2000, is a leading manufacturer of Plastic Valve in China now. We have one more branch factory and one more branch sales office, with 250 plus workers in total. There are more than 2000 kinds of products available, which covers: * Valve: 16 classifications and 2 major series with the specifications from DN15 to DN600 * Pipe: 2 series and 23 specifications. * Corrosive-resistant pump: 2 series and 6 specs. * Seals, plastic corrosive-proof screws, welding strips. These products are widely used in the industry of chemical industry, petroleum, chlorine/alkaline, metallurgy, pharmacy, dyeing, foodstuff, electroplating, environmental protection and pure water etc.. Yongzhong...