Bellow Seal Globe Valve

Bellows seal globe valve is a type of stop valve with a metal bellows seal at the valve stem. The working principle is as follows: valve stem drives the valve disc to rise and fall, open and close. The bellows expands and contracts along with the valve stem to form a seal, isolating the medium from the outside world. Relying on the pressure of the valve stem, the sealing surface of the valve disc is closely attached to the sealing surface of the valve seat, preventing the flow of the medium. Under high-temperature conditions, the valve stem does not come into contact with the medium to ensure zero leakage of the valve stem. Meanwhile, it ensures sufficient strength and toughness, and can be switched on and off tens of thousands of times. The advantages of the bellows stop valve lie in its double sealing (bellows + packing) to prevent leakage, resistance to high and low temperatures and corrosion, long service life, and no risk of external leakage. It is applied in petrochemical, pharmaceutical, nuclear power and other fields that require strict sealing, especially suitable for toxic, flammable, valuable media and vacuum systems. It is a key component of industrial pipelines with high environmental protection and safety requirements.