Middle Line Wafer Butterfly Valve 2"~48" PN10/16(150lbs) CI,DI,SS,CS,ALB, ... materials ISO, API, ASTM, ANSI, DIN, BS, JIS Middle Line Wafer Type Butterfly Valvesize:50-1200mm150LBS/bar/PSIhandle/lever/gear/pneumatic ... *C2) Applicable medium: suitable for various media, such as fresh water, sea water , sewage, vapor, food, medicine, acids, salt, alkalis, etc.3 ...