The principle of forced seal ball valve, is the ball seal device a valve

Principle: The forced sealing ball valve adds spring pressure to make the ball valve more sealed, reduces the leakage phenomenon, and is suitable for natural gas, yes, etc. High pressure is applicable.

Forced seal ball valves are widely used in natural gas and city gas metering devices, pump or compressor inlet and outlet and bypass, molecular sieve dryer system, low-temperature methanol washing device -80 280 alternating temperature frequent cut-off, ethylene glycol dehydration device cut-off and coal chemical plant liquid-solid two-phase flow medium cut-off, etc.

1) The bevel at the lower end of the Forced Seal poppet stem provides a mechanical wedge tightening force to guarantee a continuous tight seal.

2) In the process of switching and closing, the ball deviates from the valve seat and then rotates, which eliminates the friction of the valve seat and solves the problem of valve seat wear of ordinary ball valves, gate valves and plug valves.

3) The anti-scouring lifting valve stem realizes that the ball is separated from the valve seat and then rotates, and the ball and the valve seat complete the opening and closing action without contact. When the valve is slightly opened and closed, the fluid flows immediately along the sealing surface within a range of 360°, and the impurities present on the valve seat can be flushed when the fluid begins to flow. It avoids the local erosion of the valve seat by the high-speed fluid generated by the ordinary ball valve at the moment of micro-opening and imminent closing, and can still ensure long-term zero leakage and tight sealing even under the harsh working conditions of high pressure difference, and improve the service life of the forced seal ball valve.

4) No jamming The single seat design avoids the problem of increased pressure in the inner cavity of the valve and easy jamming.

5) Good sealing performance: The sealing surface of the ball and seat is specially hardened, which can meet the sealing requirements of very harsh working conditions without damaging the integrity of the seal.

Does the upstairs know what a forced seal is? In ** pasted to the information?

The forced sealing ball valve adds spring pressure to make the ball valve more sealed and reduces the leakage phenomenon, which is suitable for natural gas, yes, etc. High pressure is applicable.

Forced sealing is achieved with springs, and high pressures are not applicable.

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, Chaoda, 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.

Ball valve It has the action of rotating 90 degrees, and the body is a sphere, with a circular through hole or channel through its axis. The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium, it only needs to rotate 90 degrees of operation and a small torque to close tightly. Ball valves are most suitable for on/off and shut-off valves, but recent developments have designed ball valves to make them throttle and control flow, such as V-shaped ball valves.

The main characteristics of the ball valve are its compact structure, reliable sealing, simple structure, convenient maintenance, the sealing surface and the spherical surface are often in a closed state, not easy to be eroded by the medium, easy to operate and maintain, suitable for water, solvent, acid and natural gas and other general working media, but also suitable for the medium with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene, etc., which are widely used in various industries. The ball valve body can be monolithic or combined.

Summary. A ball valve is a fluid control device that is typically used to shut down fluid in a pipeline. It consists of three parts: the ball, the stem and the body.

The sphere has a hole half the diameter of the pipe, through which the fluid flows when the valve is opened; When the valve is closed, the fluid is isolated at both ends of the valve body and no longer flows. Ball sealing devices are usually widely used in industrial pipelines, oil, natural gas, chemical industry and other fields. Therefore, the ball seal device itself is a kind of valve.

Compared with other valves, it has the advantages of simple structure, long service life, convenient operation and good sealing, and has an important position in practical application.

A ball valve is a fluid control device that is typically used to shut down fluid in a pipeline. It consists of three parts: the ball closed Kaibi, the valve stem and the valve body. The sphere has a hole half the diameter of the pipe, through which the fluid flows when the valve is opened; When the valve is closed, the fluid is isolated at both ends of the valve body and no longer flows.

Ball sealing device Tongsun Ying is often widely used in industrial pipelines, oil, natural gas, chemical industry and other fields. Therefore, the ball seal device itself is a kind of valve. Compared with other valves, it has the advantages of simple structure, long service life, convenient operation and good sealing, and has an important position in practical applications.

Can you add, I don't quite understand it.

Ball valve is a kind of valve, which is composed of three parts: ball, stem and body. The sphere has a hole half the diameter of the pipe, through which fluid flows when the valve is opened; When the valve is closed, the fluid is isolated at both ends of the valve body and no longer flows. Ball sealing devices are usually widely used in industrial pipelines, oil, natural gas, chemical industry and other fields.

Compared with other valves in the car, it has the advantages of simple structure, long service life, convenient operation and good sealing, and has an important position in practical application.

Summary. Ball seals are often used in valves, but that doesn't mean they are valves. The ball sealing device is a device used to realize sealing, and its structural form is to use the ball as a sealing body, and realize the operation of opening and closing by rotating the ball.

In valves, ball seals are commonly used in ball valves, also known as ball valves, and are one of the common types of industrial valves. In addition to valves, ball seals can also be used in other mechanical equipment, such as automotive engines, robots, etc.

Hello dear, it is a pleasure to answer this question for you, and here is the answer to the question.

Can you add, I don't quite understand it.

Ball segment seals are often used in valves, but that doesn't mean that ball seals are valves. The ball sealing device is a device used to realize sealing, and its structural form is to use the ball as a sealing body, and realize the operation of opening and closing by rotating the ball. Among valves, ball seals are commonly used in ball valves, also known as ball valves, and are one of the common types of industrial valves.

In addition to valves, ball seals can also be used in other mechanical equipment, such as automotive engines, robots, etc.

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We are happy to answer the question for you, the fixed ball valve has four sealing points.

1. Floating ball valve The ball of the ball valve is floating, and under the action of medium pressure, the ball can produce a certain displacement and press on the sealing surface of the outlet end to ensure that the outlet end is sealed. The structure of the floating ball ball valve is simple and the sealing is good, but the load of the working medium borne by the ball is all transmitted to the outlet sealing ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the ball medium. This structure is widely used in medium and low pressure ball valves.

2. The ball body of the fixed ball valve ball valve is fixed and does not move after being pressurized. The fixed ball valve is equipped with a floating valve seat, and after being pressured by the medium, the valve seat moves, so that the dense potato sealing ring is pressed on the ball to ensure sealing. Bearings are usually installed on the upper and lower shafts of the ball, and the operating torque is small, which is suitable for high-pressure and large-diameter valves.

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Forced seals are the opposite of self-tightening seals.

1) Forced sealing of the valve.

Tighten the middle flange bolt and apply a compressive force to the sealing gasket, the preloaded gasket is compressed, and the uneven micro-gap on the sealing surface is filled. This prevents the leakage of the medium and creates the initial sealing conditions with a preload ratio on the sealing surface. When the medium pressure rises and the valve is operated, the preload specific pressure on the sealing surface drops and the gasket rebounds.

If the gasket has sufficient rebound capacity, so that the working sealing specific pressure on the sealing surface is always greater than that of the medium and the operating specific pressure, the sealing surface remains in a good sealing state. It can be seen that the necessary condition for compulsory sealing is that under the action of the medium and the operating force, a certain amount of residual compression can still be maintained on the sealing surface. It should be emphasized that:

In forced sealing, the medium pressure always tends to decrease, and the specific pressure of the pre-tight seal decreases the sealing performance.

Typical structures of forced seals are flat gasket seals, spiral wound gasket seals, and toothed gasket seals, etc. It is typically used for low-pressure, medium-pressure, and small- and medium-bore valves.

2) Before the self-tightening sealing of the valve is pressurized, tighten the bolt first, so that the valve cover rises to form the initial sealing condition between the valve cover and the wedge gasket, and between the valve body and the wedge gasket Preload specific pressure on the sealing surface. When the medium pressure rises, the bonnet is affected by the medium pressure and moves upward, and the sealing specific pressure between the bonnet and the wedge gasket, as well as between the valve body and the wedge gasket, gradually increases with the increase of pressure. In a self-tightening seal, the specific pressure of the working seal on the sealing surface is composed of two parts:

One is the specific pressure of the pre-tight seal, and the other is the specific pressure formed by the medium pressure. It should be emphasized that in the self-tightening seal, the medium pressure always tends to increase the specific pressure of the pre-tight seal and increase the sealing performance.

The higher the medium pressure, the greater the specific pressure of the working seal, and the better the sealing performance. According to this characteristic, self-tightening sealing, as a high-pressure sealing technology, is often used in high-temperature, high-pressure large-diameter control valves.

In terms of working performance, the self-sealing valve is within the working pressure range, and the greater the pressure, the better the sealing performance.

The working principle of the self-sealing valve is mainly to use the principle of sealing the wedge sealing surface under pressure, so the greater the pressure, the better the sealing effect. Of course, this pressure should be within the bearing range of the seal. Although the sealing principles are broadly similar, the sealing structure and seal material have different variations to suit different working conditions and different preload requirements (the preload is usually applied through the bolt structure and can be adjusted).

The self-sealing structure is widely used in the upper sealing of valves, mainly in the working conditions above 900lb.

<> Forced Seal Ball Valve.

Translated into English it is:

strong sealing ball valve.

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Hard Seal Ball Valve, Manual Cast Steel Hard Seal Ball Valve Body Surface Using Advanced Spraying Technology, Through the Treatment of Various Different Working Conditions, the highest hardness can reach HRC78. The sealing surface of the valve seat can be treated with a maximum hardness of HRC72. The ball and seat are paired and ground, and all sealing areas of the entire sealing surface of the ball valve are precision ground.

It is suitable for water, steam, oil, coal, fiber, thick and corrosive media, as well as media with particles at high temperature and pressure. Metal sealed ball valves have two structures: floating ball and fixed ball, and the metal seat ring is in contact with the spherical surface, and the seat ring and the spherical surface are sealed by acting on the uniform spring load on the seat ring. Due to the action of the spring load, the auxiliary seal expands, and the sealing between the valve body and the valve seat is realized.

The spring load is sufficient to provide a reliable seal between the seat and the ball, and at low pressures, a grease injection system can be designed between the seat seal face and the ball.