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.

Valves are mainly connected by flanges and can be processed into butt welding, socket and other connection methods.

The welding material for the valve seat is 507Mo, and the thickness meets the standard. The hardness of the valve disc has been quenched, and the hardness is around 40.

The valve stem has an indication of the lifting position, making the valve switch status more intuitive.

The angle type can be applied in limited spatial positions, and SDNR angle stop check valves can be manufactured, which are commonly used for right angle turns in marine pipelines.