The pipeline butterfly valve apply to many liquid and gas pipelines, and are up to the standard of AWWA, widely used in power station, civic engineering water supply system. The valves possess properties as follows: 1.Possessing properties of good cutting off and adjusting, it can reach the sealing of air bubble level. 2.Fixable seat of machine can fully adjusts, can adjust and exchange seat in site, needn?t especial tools, haven?t to disassemble valve. 3.Open-close moment is minor, service life is long. 4.Valve can install in horizontal or vertical place. Feature: 1) Standards: a) Manufacture: GB12238, JB/T8527, API609 b) Face to face/end to end dimensions: ANSI B16.10, GB12221 c) Pipe flange: JB/T74 90, GB12380, HG20615~20635, SH3006, ANSI B16.5 d) Testing and inspection: GB/T13927, API598 2) Body materials: CI, DI, WCB, SS Disc: DI, SS304, SS316, Aluminum Bronze Split Stem: WCB, SS416, SS304, SS316 Seat: NBR, EPDM, PTFE, VITON 3) Flange drilling: DIN PN10/PN16 BS4504, BS 10D/E ISO2084, ISO2531 ANSI 125/150, AS2129 ASA125/150 JIS 5K/10K 4) Nominal Diameter: DN500~1400. 5) Actuator: Electric 6) The product is 1.6Mpa pressure level, valve body made up ductile iron.