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Operating Conditions Application

20

2021-08

Working principle and characteristics of bellows sealed valve

The bellows seal valve is also known as a globe valve. It is a forced sealing valve. When the bellows seal valve is closed, a certain pressure must be applied to the valve disc to ensure it does not leak. When the medium enters the valve from below, the operating force must overcome the corresponding resistance, which includes the friction between the packing and the valve stem as well as the thrust generated by the pressure of the medium.

2021-08-20

Working principle and characteristics of bellows sealed valve

12

2021-08

Comparison of bellows seal valves and other valves

Compared to ordinary globe valves, bellows sealed valves feature a double sealing design, using bellows plus packing for sealing. If the bellows fail, the valve stem packing will prevent leakage, meeting relevant sealing standards. During use, there is no fluid loss, which can reduce energy consumption and improve the safety of factory equipment.

2021-08-12

Comparison of bellows seal valves and other valves

31

2021-05

Introduction to Instrument Valves

An instrument valve is a type of pipeline accessory. It is used to change the cross-section of the passage and the flow direction of the medium, controlling the flow of the conveyed medium. An instrument valve is a type of pipeline accessory. It is used to change the cross-section of the passage and the flow direction of the medium, controlling the flow of the conveyed medium. The sealing performance of the instrument valve refers to the ability of each sealing part of the valve to prevent medium leakage, which is an important technical performance indicator of the instrument valve. There are three sealing parts of the instrument valve: the contact area between the closing element and the valve seat sealing surfaces; the fit between the packing, valve stem, and packing box; and the connection between the valve body and the valve cover. Leakage at the first part is called internal leakage.

2021-05-31

Introduction to Instrument Valves

14

2021-05

What is a bellows stop valve?

Bellows globe valves are a relatively small category, while steam globe valves are larger. Ordinary globe valves can also be used in steam systems; it can be said that bellows globe valves belong to steam globe valves, but it cannot be said that steam globe valves belong to bellows globe valves. Overview of bellows globe valves: Bellows globe valves use a bellows structure. The lower end of the stainless steel bellows is welded to the valve stem to prevent process fluid from corroding the valve stem. The other end is placed between the valve body and the valve cover, forming a static seal. A double sealing design is adopted. If the bellows fail, the valve stem packing will prevent leakage. The bellows are welded to the valve stem to maintain stable operating performance and avoid vibration caused by the valve plug.

2021-05-14

What is a bellows stop valve?

26

2021-03

波纹管截止阀使用注意事项

Precautions for Using Bellows Globe Valve

2021-03-26

波纹管截止阀使用注意事项

03

2021-02

Do you know the working principle of the bellows stop valve?

Do you know the working principle of the bellows globe valve?

2021-02-03

Do you know the working principle of the bellows stop valve?
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