For severe service pipelines with high temperature and weak corrosive fluid, OUWEI double offset butterfly valves are your reliable pick. Offset disc structure minimizes seat friction, extending service life greatly. Metal and PTFE composite seats are optional, working stably under -20℃~350℃. API 609 certified, widely adopted in chemical plants, thermal power and oil transfer stations. Custom alloy materials like Hastelloy are available on request. #OUWEI #DoubleOffsetButterflyValve #HighPerformanceValve #ChemicalValve #PowerPlantValve #PetrochemicalEquipment