... valves,ball valves,butterfly valves,diaphragm valves,mud valve ect.And it has complete inspection equipment, ... 3D Eccentric structure ,the sealing ring of valve body adopts a multi-level structure of ... disc can contact the sealing surface of valve body uniformly and reliably,achieving no leakge ... ) ±570°Calloy steel4) Suitable medium: water, oil, gas,vapor,steam etc.5) Body and disc material: WCB, ...