... , and TS certificates. 2. design & Manufacture:floating ball valves mainly apply to the industries of nature gas, oil ... is made of casting or forging; the ball is floating, the ball moves (floats) downstream to maintain close contact ... sealing and long stable operation of this series of ball valve. It has the merits of sealing reliability, ... , PEEK, nylon, RPTFE big sizes flanged cast steel ball valve