Valve with balanced type valve rod

The utility model is a valve stem balance type valve, comprising a driving device (5) which is arranged on the top end of the seal bracket (4). A driving medium (6) of the driving device (5) is arranged inside the balance cavity of the bracket (4), and is connected with one end of the balance valve stem (8). The lower end of the seal bracket (4) is connected with the valve body (9). The lower end of the balance valve stem (8) is arranged inside the upper cavity (10) of the valve body (9) and is connected with a valve flap (2). The valve flap (2) is sealedly assorted with a valve seat which is between the upper cavity (10) and the lower cavity (1). The upper cavity (10) of the valve body (9) is separately sealed with a balance cavity (7) of the sealing bracket (4) through a sealing structure (11). The sealing structure (11) is sealedly connected with the valve stem (8). The balance cavity (7) is communicated with the lower cavity (1) of the valve body (9) through an air channel (3). The balance valve stem (8) has an axis direction load bearing face (12) inside the balance cavity (7). The balance valve stem (8) has an axis direction load bearing face (18) inside the valve upper cavity (10).