BALL VALVE

摘要

Disclosed is a ball valve, comprising a valve body (2), a valve seat (7), a ball sealer (3) and a valve stem (5) cooperated with each other. The valve seat (7) is connected with the valve body (2) by a screw pair. The ball sealer (3) is received within the valve body (2) and provided with a flow passage hole (31), and the valve stem (5) is connected with the ball sealer (3), to rotate the ball sealer (3)for opening or closing the flow passage (31) of the ball sealer (3). The ball valve can adjust the sealing capability of the sealing pair in the ball valve.