1) Design: API 594 2) Face to face: ASME B 16.0 3) Flanged ends: ASME B 16.5 4) Test and inspection: API 598 5) Body material: Hastelloy C-276, Hastelloy C-4, Hastelloy C-22, Hastelloy C-2000, Hastelloy B-3, Hastelloy G-30 6) Pressure: 150 ~ 600lbs7) Applicable temperature: d250C 8) Working mediums: strong corrosive medium 9) The sizes of serial valve connecting flange can be designed according to customers' requirement