Valve description: Center line-type Butterfly Valve, raised flanged, soft seal. Design: API 609. Body: ASTM A351 CF8 Nominal size: 4 Inch. Nominal class: 150 LB. End Connection: RF flange. Face to face: API 609. Test and inspection: API 598. Product Range: Body material: Stainless steel. Normal diameter: 2 - 24 Inch (DN50 - DN600). End connection: Flanged, WAFER, LUG. Pressure range: Class 150 LB (PN10 - PN16). Working temperature: -29℃ - +100℃.