The bellows stop valve is of non rising stem design. The upper end of the bellows is welded to the sealing bowl and the lower end is welded to the valve stem. The bellows plays the first sealing role in the valve cover and valve stem hole. In addition, the second seal is the packing gland. Compared with the shortcomings of ordinary packing stop valves that are prone to aging and leakage, metal bellows seals are safer and more durable, with a longer service life. The maintenance and replacement frequency is greatly reduced, saving Unit cost.