الوصف

Standard and Specification
1. Design standard conform to: API**9
2. Connection flange conform to:ASME B*6.1,ASME B*6.*2,ASME B*6.5,ASME B*6.*7 Category A, 
3. Top flange conform to: ISO ***1
4. Face to face conform to:API **9 Category A
5. Test standard conform to: API **8

Performance Specification：
    Nominal Diameter：DN*0～***0
             NPS:1 1/2～**0
    Test Pressure（Water）Ps（MPa）
       Body Test：1.5 Times Rated Pressure
        Seat Test：1.1 Times Rated Pressure
Working Temperature: **9℃～***0℃（Special Working Temperature:**7℃）
Product Features:
1. Integrated long-neck body makes easy the pipeline insulation, and installing actuating device.
2. Specially finished disc sealing surface, minimizes operating torque, improves long service life of seat and reach the air-tight sealing; Hollow disc design, withstands high pressure,with light weight and low flow resistance. 
3. The outer edge of seat rubber exceeds body ends, functioning as flange gasket.
4. Through-out bolt or one-side bolt used for flanged type butterfly valve, easy replacement and pipeline maintenance.
5. Shaft and disc connected without pin to achieve best match and opening torque transmission, reducing leakage points. 
6. Manual, electic and peneumatic actuator are available.
7. The products are certified: API**9, NSF.