... :Brief Introduction:Butterfly valve is mainly consisted of body, stem, disc, seat and driver(lever, gearbox, pneumatic and ... and controlling flow of valve are made by turning stem and disc together.Characteristics of Product:Typical Application: ... , Food, Beverage.Product Information:Flanged butterfly valve, extension road butterfly valve: SizeDN50~DN2400Design StandardEN593End flangeEN 1092, ANSI B16 ...