... design project 5.passed ISO9002 About factory: TIANJIN WORLDS VALVE Co., Ltd. is a production, sales and service ... 900, 1500, 2500 & 4500. End Connections: Flanged, Buttweld, Socket Weld, Hub Connectors, Compact Flange or other proprietary connections. Materials (Standard ... Valve Co., Ltd. is going to supply the best products and services for all customers. large size cast iron flange butterfly valve ...