How about the function of the bellows globe valve

The bellows globe valve adopts a bellows structure inside, and the lower end of the stainless steel bellows is welded to the stem to prevent the process fluid from etching the stem. The other end is placed between the valve body and the bonnet to form a static seal. The double sealing design is adopted, if the bellows fails, the stem packing will also avoid leakage, and the bellows is welded to the stem to maintain stable running performance, so as to avoid the stem vibration caused by the vibration of the valve plug.

It is most suitable for steam, flammable, explosive, heat transfer oil, high-purity, toxic and other media pipelines.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Abstract:Bellows globe valve, also known as bellows seal globe valve and steam globe valve, adopts double-layer bellows design, welds and infiltrates the valve stem to maintain stable operation performance, and avoids the vibration of the valve stem caused by the vibration of the valve plug. Bellows globe valveIn the case of high temperature, the valve stem does not contact with the medium, ensuring zero leakage of the valve stem.

What is the difference between bellows globe valve and ordinary globe valve? Which is better, bellows globe valve or ordinary globe valve? Let's find out.

1. The difference between the bellows globe valve and the ordinary interception spring stop valve.

1. The bellows stop valve has no leakage, and it is relatively safe to use in high-risk media.

2. The ordinary globe valve is sealed with packing, and the valve stem and packing will slide, which is easy to leak at low temperature (valve core).

3. The bellows globe valve replaces the packing seal with a closed bellows that can be stretched and compressed, which can effectively prevent the external leakage caused by packing loss. It is generally used for the transportation of highly permeable media, such as valves on hydrogen systems, as long as the bellows are not damaged, there is generally no leakage. However, ordinary globe valves are sealed with packing material, which is prone to leakage.

4. The opening or closing stroke of the stem of the bellows globe valve is relatively short, and it has a very reliable cut-off function, and because the change of the valve seat port is proportional to the stroke of the valve disc, it is very suitable for the adjustment of the flow rate. As a result, bellows globe valves are ideal for use as shut-off or regulation as well as throttling.

2. Which is better, bellows globe valve or ordinary globe valve?

The bellows globe valve, also known as the bellows seal globe valve, is designed to form a metal barrier between the fluid medium and the atmosphere through automatic roll welding to ensure zero leakage of the valve stem.

Compared with traditional globe valves, it has the following advantages:

1. Double sealing design (bellows + packing) If the bellows is leaking and failing, the stem packing will also avoid leakage and meet international sealing standards.

2. No fluid loss, reduce energy loss, and improve the safety of factory equipment.

3. Long service life, reduce the number of maintenance and reduce operating costs.

4. The sturdy and durable bellows sealing design ensures zero leakage of the valve stem and provides maintenance-free conditions.

5. The gaseous medium valve seat adopts PTFE soft sealing material to improve the tightness of the valve.

6. The high-temperature resistant 425 valve seat adopts a cone hard seal. Achieve airtightness and zero leakage.

Special reminder, when we are in use, to maintain the distance between the bellows stop valve and the valve, not to let the bellows bear too much pressure, but also pay special attention to the fusion of materials, preferably polymer materials that can withstand high temperatures. The bellows should be evaluated and recorded when welding.

Qinqin S-type globe valves and bellows globe valves are different types of globe valves. S-type globe valve is a commonly used plate globe valve, and its structural shape is:"s"It has the characteristics of low fluid resistance and flexible opening and closing. It is typically used in low-pressure, small-bore piping systems and can also be used as a control valve.

The bellows globe valve is a kind of seal with a metal corrugated lining, and a spring is set at the guide part of the valve, which can absorb the vibration and displacement in the pipeline with fiber balancing fingers, and has good sealing and corrosion resistance. Bellows globe valves are usually suitable for piping systems under high pressure and high temperature conditions, and can meet the needs of the return flow end with large fluctuations. Therefore, although it is a globe valve, according to different working conditions and requirements, different types of globe valves can be selected to better meet the needs.

The bellows globe valve is a bellows structure inside, and the globe valve forms a static seal in the pipeline, which is generally used in the pipeline of steam, flammable and explosive, heat transfer oil, high purity, toxic and other media. Its structure is scientifically optimized, reasonably sealed, effective and beautiful. The material selection is also very rigorous, requiring extremely strong wear-resistant, corrosion-resistant and anti-friction characteristics, long service life, and different sizes are suitable for different engineering needs.

So, when we need to use bellows globe valves in our projects, which manufacturers should we find? 

East China

Funing County Heli Valve, located in Funing, Jiangsu, registered in 2010, plant area of 25,000 square meters, annual turnover of 7.01 million -10 million, located in the Yangtze River coastal economic belt of the first intersection, excellent industrial heritage, the manufacture of globe valves rich experience, quality trustworthy.

Shanghai Lianggong Valve Factory, located in 1981, is registered in 1981, with a plant area of 21,200 square meters and an annual turnover of more than 100 million. The company has 60 years of rich experience in the design and manufacture of various types of valves and valve actuators, and the pre-sales and after-sales services in various regions of China are also quite complete.

South China

Flender Control Equipment (Guangzhou) ****, located in Tianhe District, Guangzhou, Guangdong, the British Flender Control Company was established in 1972, committed to the technical development of control valves, manufacturing technology and Shengchasun production technology in the industry to establish an unparalleled good image, its products are designed and produced in accordance with the most stringent engineering standards.

Guangzhou Gui valve electromechanical equipment, located in Guangzhou, the main products of the city imported valves, pumps and electropneumatic devices. The company's main products are mainly imported, and the cooperative manufacturers include Kitazawa Kitz of Japan, VENN of Japan, and 317 of TaiwanNorth Valve, etc.

North China

Tianjin No.15 Valve, located in Dongli District, Tianjin, is one of the country's most important and largest globe valves, ball valves and other general valves, has a high reputation and influence in the industry, supply and demand, best-selling domestic and foreign markets.

Beijing Feihil Valve, located in Fengtai District, Beijing, it is a professional enterprise engaged in all kinds of valves and mechanical equipment, and enjoys a good reputation in the industry in the capital of China.

Southwest

Chengdu Chenggao Valve Co., Ltd. is located in Chengdu, Sichuan. Chenggao valve mainly foreign latest technology, strict implementation of ANSI and other international advanced standards, its stainless steel bellows globe valve is highly sought after by customers, sales channels are very wide, sold at home and abroad.

In many cases, the damage of the bellows globe valve is not due to the result of production and use, but mechanical extrusion, therefore, when using it, it is necessary to pay attention to troubleshooting. The use of bellows globe valves involves production safety, and the selection of their quality needs to be very careful, as well as their service life.

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Bellows valves can be used on negative pressure systems, while ordinary globe valves will leak.