Bellows stop valve is a kind of stop valve and one of the widely used valves. Its popularity is due to the small friction between sealing surfaces in the opening and closing process, relatively durable, small opening height, easy manufacture and convenient maintenance. It is not only suitable for medium and low pressure, but also suitable for high pressure. The closing principle of the stop valve is to make the sealing surface of the valve disc closely fit the sealing surface of the valve seat by relying on the pressure of the valve rod to prevent the flow of media. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metal and radioactive media. Therefore, this type of shut-off valve is very suitable for cut-off or regulation and throttling. Because the opening or closing stroke of the valve stem of this kind of valve is relatively short, and has a very reliable cutting function, and because the change of the valve seat opening is in direct proportion to the stroke of the valve disc, it is very suitable for the regulation of flow.

The bellows seal stop valve adopts the design of bellows seal, which completely eliminates the shortcomings of rapid aging and easy leakage of the ordinary valve stem packing. It not only improves the use of energy efficiency, increases the safety of production equipment, reduces the maintenance cost and frequent maintenance, but also provides a clean and safe working environment.

Advantages of bellows stop valve:

Double sealing design (bellows + packing) if the bellows fails, the valve stem packing will also be avoided.

Leakage and comply with international sealing standards.

No fluid loss, reduce energy loss and improve plant equipment safety.

Long service life, reduce maintenance times and reduce operating costs.

The rugged bellows seal design ensures zero leakage of the valve stem and provides maintenance free conditions.