As one of the leading u type resilient seat butterfly valve,Website: , U section resilient seat butterfly valve, U type flange butterfly valve manufacturers and suppliers in China and equipped with a productive factory, Shanghai Hugo Valve Co.,Ltd is always at your service. U type resilient seat butterfly valve Characteristics 1, Two-way sealed and zero leakage 2, fully rubber lined seat, which isolated the valve body and pipe medium, as the valve body will not contact the medium, no need to consider whether the body material can anti corrosion or not if there is corrosive medium in the pipeline.  3, actual operation torque is lower than the common industry standard, reduced the usage cost for electric and electric actuator. 4, light weight and short length of face to face. 5, full port design, high Cv values. 6, all the body drilling standards are according to AWWA C207, ASME B16.1 CL125,ASME B16.5 CL150,DIN PN10/16 and other countries flange standard.  Valve materials of construction Body Materials: Cast Iron, Ductile Iron, WCB , CF8/CF8M Body painting : epoxy coating  Seat Materials: NBR, EPDM, VITON Disc Materials: Ductile Iron, duplex S.S., CF8,CF8M, Al-bronze C958 Disc surface treatment : Nylon coating, Halar layer, epoxy coating Stem Materials: SS416/420, SS304, SS316, duplex S.S.    Applicable standard  Size Range: 2~80"(DN50~DN2000） Pressure: PN10, PN16, Class125, Class 150 Standard : ANSI,DIN,JIS  End Connection: flange Operate: Manual, worm gear, double acting & spring return pneumatic actuated and electric motorized.