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A ball valve is a valve that opens by the turn of a handle, gearbox or other actuation method attached to a ball, the part of the valve which controls the flow through it. The ball has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and flow is blocked. The handle or lever will be inline with the port position letting you "see" the valve's position. Position indicators will be applied to a gearbox or actuator as required. The ball valves, along with the butterfly valve and plug valve, are part of the family called quarter turn valves.
Principle of the forged steel floating ball valve: This kind of ball valve has a floating ball supported by two valve seats. Under the medium pressure effect, a certain displacement can be generated by the ball itself so as to be pressed onto the seat seal ring at the outlet, guaranteeing tightness at the outlet.
The side entry trunnion mounted ball valve has been designed two piece body type or three piece body type and with two floating seats, which are movable