Features and application： Impact structure, small bulk, light weight, flexible operation, fine sealing, little fluid resistance, prolonged service time, convenient installation and removal and no limit of installing directions. The end connection type is usually wafer. Flange joint is also OK. Applicable to water, vapour, oil, sulphuric acid and nitric acid, etc. of Class150、PN0.6～1.6MPa、working temperature-29～150°C. According to customers needs, different rubbers can be applied to different fluids and temperatures. Metal sealing butterfly valve：Apply reasonable double eccentric structure. Apart from the advantage of glue lined butterfly valves, it is also high temperature resistant and has wider pressure range. The type of connection is mainly wafer. Flange joint is also applied. Applicable to Class150、PN0.6～2.5MPa、working temperature-29～425°C（carbon steel）or-40～550°C（stainless steel）. Different materials of valves can be applied to water, vapour, oil, niric acid, acetic acid, oxidation fluid and urea etc . Standards： Manufacure: GB12238, JB/T8527, API609 Face to face/end to end dimensions: ANSI B16.10, GB12221 Pipe flange: JB/T74～90、GB9112～9131、HG20615～20635、 SH3006、 ANSI B16.5 Testing & inspection: GB/T13927, API598 Body materials：gray cast iron、ductile cast iron、WCB、CF8、CF3、 CF8M、CF3M、ZG1Cr18Ni9Ti、 ZG1Cr18Ni12Mo2Ti Type of connection：wafer、flange Operation：wrench, worm gear actuator ,pneumatic actuator, electric actuator