API Butterfly Valve 1.Diameter:2"~72" ; 2.Pressure:150LB; ... Iron, Stainless Steel, Bronze. API-Structured Worm Gear Butterfly Valve Nominal diameter: 2"~72"Applicable temperature: 150LbApplicable temperature: -20 ... medium: air, water, steam, gas as well as weak corrosive media, such as acid, alkali, and salt and ... 'aImgSrc': aBigImageSrc } ); } )(); API 609 Standard Worm Gear Operation Butterfly Valve