A bellows sealed globe valve is a type of globe valve installed on steam pipelines. It uses a bellows as the valve stem sealing element, which achieves leak-proof performance at the valve stem to prevent steam leakage. As the ideal valve for boiler steam systems, it eliminates fluid loss, improves energy efficiency, enhances the safety of production equipment, reduces maintenance costs and operating expenses, and provides a clean and safe working environment.

Working Principle and Characteristics

The bellows sealed globe valve plays a key role in cutting off and throttling the medium in the pipeline. As an important shut-off valve, it works by applying torque to the valve stem. The valve stem then exerts axial pressure on the disc, bringing the disc's sealing surface into tight contact with the valve seat's sealing surface to prevent medium leakage through the gap between the sealing surfaces.

Application Fields

Bellows sealed globe valves are widely used in petrochemical, chemical fiber and textile, plastic and papermaking, power generation and steel, printing and dyeing, rubber, natural gas and other gas systems. With safe and reliable performance, they are also extensively applied to industrial fluids such as ethylene glycol. Available drive modes include manual, gear-operated, electric, and pneumatic.

Structural Features

1. Double sealing design (bellows + packing): If the bellows fails, the valve stem packing will prevent leakage, complying with international sealing standards.

2. No fluid loss reduces energy consumption and improves factory equipment safety.

3. Long service life minimizes maintenance frequency and lowers operating costs.

4. Robust bellows sealing design ensures zero leakage of the valve stem, providing maintenance-free operation conditions.

5. For gas media, the valve seat adopts PTFE soft sealing material to enhance the valve's sealing performance.

6. For high-temperature applications (≤425℃), the valve seat uses conical hard sealing to achieve zero air leakage.