... way of floating ball valve is manual, worm gear derive, pneumatic, electronic or hydraulic.Characteristic1,O-shaped floating type ball valves adopt ... , pls refer to the parts of actuator andadjusting valve.1,O-shaped floating type ball valves adopt all-diameter or crinkled-diameter ... ring burned in the fire, all the sealing parts of the ball valve would form stiff seal6,Select pneumatic, electric, and ...