タイトルまたは説明

1. The design of product conforms with the standard API **9 of USA petrol association. 2. The structure of butterfly valve is compact, small volume light weight, flexible operation, convenient maintenance. 3. The design adopts the three eccentricity sealing principle, the sealing performance is reliable. 4. The sealing adopts the stainless steel material, hold the special technology treatment during producing, it has the feature of anti-high temperature, anti-corrosion, long life. 5. Over flowing area is big, flow resistance factor is small, the flowing capacity is big. 6. Anti-aged, anti-radiation, it is used for long time.