The design standard of W & T brand three eccentric metal hard seal quick cut-off and regulating butterfly valve is ASME B16 34AP1609/ Fire safe testedAPl607/IS015848 Ta-Luft； It is suitable for quick cut-off and regulation of flow in high-pressure pipeline. The maximum pound level can reach 2500lb; The valve can be opened and closed flexibly, which can cut off the pipeline quickly, and its performance is better than that of the gate; High regulating performance, can replace globe type regulating valve; Electric, pneumatic and (electric) hydraulic driving devices can be selected for the actuator; The selected material is integral forging, and A105 can be selected F22. F91、F92. 304 304L 316. 316L. 3471h et al; Wide applicable temperature range: - 196 ℃ - 850 ℃, the application industry is LNG Coal chemical industry, electric power, refining, metallurgy, etc.