... , 4.different standards. 5.handle,hand wheel,electric,pneumatic Multi standard Butterfly Valvesize:50-1200mm150LBS/bar/PSIhandle/lever/gear/pneumatic/electric ... *C2) Applicable medium: suitable for various corrosive and dangerous media.Standard: ItemDesignFlange EndTop FlangeFace to FaceTest&CheckStandardMSS SP-67, API609, EN593 ...