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Professional Manufacturer Pressure Drop Price List Lever Opreated 6 Inch Full PTFE Lined Concentric DIN BS Control Butterfly Valve, Find Details and Price about Cast Bronze Wafer Butterfly Valve Cast Iron Ci Body Wafer Butterfly Valve from Professional Manufacturer Pressure Drop Price List Lever Opreated 6 Inch Full PTFE Lined Concentric DIN BS Control Butterfly Valve - Tianjin Zhongfa Valve Co., Ltd.