The steam shut-off valve (also known as "bellows shut-off valve") adopts double-layer bellows design and is welded to the valve stem to maintain stable operation performance and avoid valve stem vibration caused by valve plug vibration.

Under high temperature, the valve stem does not contact with the medium to ensure zero leakage of the valve stem of Dalian marine valve. At the same time, it ensures sufficient strength and toughness, and can be opened and closed for tens of thousands of times. The handwheel adopts ergonomic design, with longer service life and easy and convenient operation. The opening and closing part of the steam stop valve is a plug-shaped valve disc, the sealing surface is flat or conical, and the valve disc moves linearly along the center line of the fluid. It is also called shut-off valve. It is a widely used valve. It is popular because the friction between the sealing surfaces is small during the opening and closing process, the ratio is durable, the opening height is not high, the manufacturing is easy, and the maintenance is convenient. It is not only suitable for medium and low pressure, but also suitable for high pressure. It is widely used to cut off or circulate the medium in the transmission pipeline of food, medicine, petroleum, chemical industry, natural gas, steel, environmental protection, paper making, etc.