Hangzhou on the Butterfly (pipeline) Valve Co., Ltd., the company is from the water supply equipment (Hangzhou) from the company restructuring. From the late 1980s to develop and produce the first 'expansion joints' and the mid-1990s to develop and produce the first' Butterfly ', after 20 years of development, has become one in the water industry in the service of professional firms. Hangzhou butterfly valve on the door company in April 2005 according to market basis, implementing a wide range of operating principles, based on a number of supporting business development, corporate restructuring as an independent company. Based on industry network edge, on sales of butterfly valves brand products Our professional standards for customers to do good service. The company's products have b..