... ductile iron, WCB, stainless steel,Al-bronze(C95400, C95800, etc)Shaft: SS420Body seal ring:SS304Disc seat ring: EPDM/NBR/VITONRetainer ring ... epoxy power, coating thickness min. ≥250micron 6. Operating mode: bare shaft, worm gear+handwheel, electirc actuator, pneumatic actuator, hydraulic actuator, ... case, wood case,8. Delivery port: Shanghai, Tianjing, etc. Flange type rubber seated butterfly valve