ZD company is specialized in developing and manufacturing low and middle pressure butterfly valve, ball valve,tilting disc check valve,gate valve and valves in special design. we have ISO9001/CE/API/API6D/WRAS/ISO14001 certificates; our main products are bi-directional metal seated butterfly valve,bi-directional rubber seated butterfly valve; rubber-lined butterfly valve,eccentric ball valve, API6D ball valve,gate valve and tilting disc check valve. we ZD will lead the enterprise to the futrure with creativity and a modern business plan. we sincerely welcome all our friends at home and abroad to our company.