Valve seat

The utility model relates to the technical field of an adjusting valve, in particular to a valve seat which is applied to the adjusting valve. The valve seat is applied to the adjusting valve and comprises an annular body, wherein the edge of the annular body is provided with annular steps. Compared with the prior art, the valve seat has the advantages that: 1, the valve seat and a valve body are sealed by using a sealing member, so that the phenomenon of internal leakage can be avoided in long time and an internal leakage point of the adjusting valve can be eliminated; 2, the valve seat can slightly move back and forth and left and right in the valve body after being assembled, and a valve core head and the valve seat have the function of self-defining sealing faces during sealing, so that guarantee is provided for reliable sealing; 3, a connection face of the valve seat and the valve body is a plane, the sealing faces can be subjected to overlaying welding or ground without a tool clamp to make the operatio