... design project 5.passed ISO9001 1.About factory: TIANJIN WORLDS VALVE Co., Ltd. is a production, sales and service as ... -tight sealing with no leakage under the pressure test. NAMEwafer butterfly valveSizeDN40-DN1600End flangeANSI B 16.1, EN 1092, AS 2129Face ... of DNV. Tianjin Worlds Valve Co., Ltd. is going to supply the best products and services for all customers. cast iron wafer butterfly valve