... range: PN6-PN40 Double flange, double eccentric, rubber seated butterfly valve, 1. Size and pressure range: Size: DN100-DN4000 ... steel,Al-bronze(C95400, C95800, etc)Shaft: SS420Body seal ring:SS304Disc seat ring: EPDM/NBR/VITONRetainer ring: SS304Shaft ... Operating mode: bare shaft, worm gear+handwheel, electirc actuator, pneumatic actuator, hydraulic actuator, etc. 7. Packing: seaworthy packing: ...