Tianjin World Machinery Manufacture Co., Ltd. We are a leading company with 14 years\' experience in manufacture and export of Butterfly Valve, Gate Valve, Check Valve, Globe Valve, Y-Strainer, Rubber Expansion Joint & Dismantling Joint. Our price is very competitive because we do parts process and painting ourself and casting factory is near us. We have passed through ISO9001:2008, CE.