ZhengZhou City ZhengDie Valve Co., Ltd, which is a subsidiary company of China Technology Inc.(NASDAQ:CVVT), is specialized in developing and manufacturing low and middle pressure butterfly valve, ball valve, gate valve, tilting disc check valve and valves in special design, we have ISO9001/CE/ISO14001/API/API6D certificates, our main product are bi-directional metal seated butterfly valve, bi-directional rubber seated butterfly valve, rubber lined butterfly valve, tilting disc check valve, API6D ball valve, eccentric ball valve, gate valve, our products are sold and installed in China/ South East Asia/Europe/Middle East/America and Africa. Size range for butterfly valve:DN100 up to DN4000, Pressure range for butterfly valve:PN1.0 UP to PN64 bar; Size for ball valve:DN50 TO DN1600, pressure from PN1.0 TO PN42 bar. we ZD will lead the enterprise to the future with creativity and a modern business plan. we sincerely welcome all the customers at home and abroad to our company.