What are the product features of the bellows globe valve?
Release date:
2022-02-07
Bellows globe valve, also known as bellows sealed globe valve, forms a metal barrier between the fluid medium and the atmosphere through automatic roller welding, ensuring a zero-leakage valve design.
Bellows Globe Valve Also known as bellows sealed globe valve, it forms a metal barrier between the fluid medium and the atmosphere through automatic roller welding, ensuring zero valve leakage by design.
Bellows Globe Valve Internally uses a bellows structure, with the stainless steel bellows bottom welded to the valve to prevent process fluid from seeping into the valve. The other end is placed between the valve body and the valve, forming a static seal. It adopts a double seal design; even if the bellows fail, the valve packing can prevent leakage. The bellows are welded to the valve, maintaining stable working performance and preventing valve vibration caused by valve oscillation. It is most suitable for steam, flammable, explosive, heat-conducting oil, high purity, toxic, and other media.
Bellows Globe What are the product features of the valve?
1. The product has a reasonable structure, reliable sealing performance, and an attractive appearance;
2. The sealing surface is coated with Co-based hard alloy, which is wear-resistant, corrosion-resistant, friction-resistant, and has a long service life;
3. The valve stem is quenched and surface nitrided, providing good corrosion resistance and friction reduction performance;
4. Right-angle German standard Bellows Globe Valve Double seal, more stable performance;
5. Valve stem lifting position marked for more intuitive operation;
6. The material of parts, flange, and butt weld size can be reasonably selected according to actual working conditions or user requirements to meet various engineering needs.
In the sterile process industry, the "competition between bellows valves and diaphragm valves" has a long history. For a long time, diaphragm valves have had the advantage due to their simple structure, low price, and ease of cleaning and sterilization.
Bellows globe valves, also known as globe valves, are widely used valves. During opening and closing, the friction between sealing surfaces is small, durability is good, the opening height is not large, manufacturing is convenient, and maintenance is simple. They are suitable not only for medium and low pressure but also for high pressure. The closing principle of the globe valve relies on the valve stem pressure to tightly fit the valve disc sealing surface with the valve sealing surface to prevent medium flow.
Valves play an important role in cutting and throttling the medium in pipelines. Globe valves are very important valves that apply torque to the valve, applying pressure axially to the valve.
What are the working principle and characteristics of bellows globe valves?
Valves play an important role in cutting and throttling the medium in pipelines. Globe valves are very important valves that apply torque to the valve, applying pressure axially to the valve.
The sealing pair of the globe valve consists of the valve sealing surface and the valve sealing surface, with the valve moving vertically along the valve centerline. During the opening process of the globe valve, the starting height is small, flow regulation is easy, manufacturing and maintenance are convenient, and the pressure application range is wide.
In industrial production, compared with other common cutting valves, structurally, globe valves are simpler than electronic valves, and manufacturing and maintenance are easier. In terms of service life, the sealing surface of the globe valve is not easily worn or scratched. During valve opening, there is no relative sliding between the valve and seat sealing surfaces, so wear and scratches on the sealing surfaces are minimal, resulting in a longer service life of the sealing pair. The valve moves less during the entire closing process, with a relatively small height. The disadvantage of globe valves is that the opening and closing torque is large, making quick operation difficult. Because the internal flow path of the valve is tortuous, fluid flow resistance is high, and fluid dynamic losses in the pipeline are significant.
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