What are the structural characteristics of flanged ball valves?

1. There is no friction in opening and closing.

This function completely solves the problem of traditional valves affecting the sealing due to the friction between the sealing surfaces.

2. Top-mounted structure.

3. Single seat design.

It eliminates the problem that the medium in the cavity of the valve affects the safety of use due to abnormal pressure increase.

4. Low torque design.

The valve stem with special structure design can be easily opened and closed with only a small handwheel valve.

5. Wedge-shaped sealing structure.

The valve is sealed by the mechanical force provided by the valve stem to press the ball wedge to the valve seat, so that the sealing of the valve is not affected by the change of pipeline pressure, and the sealing performance is reliably guaranteed under various working conditions.

6. Self-cleaning structure of the sealing surface.

When the ball is tilted away from the valve seat, the fluid in the pipeline passes evenly along the sealing surface of the ball at 360°, which not only eliminates the local scouring of the valve seat by the high-speed fluid, but also washes away the accumulation on the sealing surface to achieve the purpose of self-cleaning.

Flanged Ball Valve New Features:

1. Adapt to harsh working environment.

The ball valve only needs to be rotated 90 degrees and the torque is small to close tightly. The completely equal body cavity provides a straight-through flow path with minimal resistance to the medium. Ball valves are generally considered to be most suitable for direct opening and closing, but recent developments have designed ball valves to throttle and control flow.

The main feature of the ball valve is that it is compact in its own structure, easy to operate and maintain, and is suitable for general working media such as water, solvents, acids and natural gas, but also for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene. The ball valve body can be monolithic or combined.

2. Applicable requirements are strictly cut off.

Orbital ball valve is a relatively new type of ball valve, which has some advantages unique to its own structure, such as frictionless switch, seal not easy to wear, and small opening and closing torque. This reduces the size of the actuator. Equipped with a multi-turn electric actuator, it can realize the adjustment and strict cutting of the medium.

It is widely used in petroleum, chemical industry, urban water supply and drainage and other working conditions that require strict cut-off.

Ball valve and gate valve are the same type of valves, the difference is that its closing part is a ball, and the ball rotates around the center of the valve body to achieve opening and closing. Ball valves are mainly used in pipelines to cut off, distribute and change the flow direction of the medium. Flanged ball valve standard GB T21465-2008 "Valve Terminology" is defined as:

The opening and closing parts (balls) are driven by the valve stem and rotate around the axis of the valve stem.

Here are some 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.

The main components of the ball valve are: valve body, ball, valve seat, valve stem and transmission device, etc., as shown in the following figure

The ball valve is mainly composed of a valve body, a ball, a sealing ring, a valve stem and a driving device.

1) Valve body; The valve body houses the ball and sealing ring, and there are medium inlet and outlet channels.

2) Sphere: The sphere is the opening and closing part of the ball valve, and its surface is the sealing surface, so it requires high precision and roughness. There are medium channels with circular cross-sections in the sphere, and the diameter of the channel is usually equal to the nominal diameter of the valve. For straight-through ball valves, the passage on the ball is straight-through.

According to the way the ball is fixed in the valve body, the ball valve can be divided into two types: floating ball type and fixed ball type.

Floating ball valve: the ball is enough to float, and the ball is pressed to the sealing ring on the specific side under the action of medium pressure, so as to ensure the sealing. It is characterized by simple structure, unilateral sealing, and good sealing performance, but due to the large compression force between the spherical surface and the outlet side sealing, the opening and closing torque is also large, and it is generally suitable for occasions with smaller diameter and lower pressure.

Fixed Ball Valve: The ball is fixed by bearings at the upper and lower ends and can only rotate.

movement, no horizontal displacement can be generated. In order to ensure tightness, it must have a floating seat that can generate thrust, so that the sealing ring is pressed against the ball, so it has a complex structure and large dimensions. Since the ball is held in place by the bearing, the medium.

The pressure on the ball is borne by the bearing, so the seal diagram is not easy to wear and has a long service life. The friction between the sealing ring and the ball is small, and the opening and closing are also more labor-saving. Generally, it is suitable for occasions with larger diameter and higher pressure.

A ball valve is a type of valve that uses the ball as a shut-off part and rotates to control the flow of fluid. Ball valves have the following characteristics:

V-Ball Valve. 1.Fast Switching: The opening and closing speed of the ball valve is absolutely very fast, and it only needs to be rotated 90 degrees to open or close completely, so it is suitable for occasions where the fluid needs to be cut off quickly.

V-Ball Valve. 2.Good throttling: The fluid channel of the ball valve is spherical, at 90 degrees to the fluid flow direction, so the maximum flow can be obtained when fully opened, and at the same time, due to the smooth surface of the ball itself, it can also achieve better fluid control.

V-Ball Valve. 3.Good pressure resistance: The structure of the ball valve is relatively simple, and the ball is made as a whole, which can withstand high pressure.

V-Ball Valve. 4.Good corrosion resistance: The ball body of the ball valve is generally made of stainless steel, copper alloy and other corrosion-resistant materials, which can adapt to the corrosiveness of various media.

V-Ball Valve 5High reliability: The structure of the ball valve is simple, the failure rate is low, and the maintenance is simple.

Ball valves are widely used in petroleum, chemical, water treatment, electric power and other industries, and play a very important role in fluid control.

The valve is a kind of pipeline accessory installed on the pipeline to control the flow of medium, and the common valves are butterfly valves, gate valves, ball valves, check valves, globe valves, etc.

Butterfly valve models are: D71X, D341X, D342X, D343H, D343W, D373W, etc.;

Gate valve models are: Z45T, Z41T, Z45X, Z41X, Z41H, Z41W, etc.;

Ball valve models are: Q11F, Q41F, Q341F, etc.; Chunhan.

Check valve models are: H77X, roll H44H, H71H, H41X, H44W, etc.;

Globe valve models are: J41H, J41W, J11W, etc.

1.The fluid resistance is small, the ball valve is the least fluid resistance among all valves, even the reduced diameter ball valve, its fluid resistance is quite small.

2.The switch is fast and convenient, as long as the stem rotates 90 degrees, the ball valve will complete the full opening or closing action, and it is easy to achieve rapid opening and closing.

3.Good seat sealing performance. The sealing ring of most ball valves is made of elastic materials such as polytetraethylene, and the soft sealing structure is easy to ensure unsealing, and the sealing force of the ball valve increases with the increase of medium pressure.

4.The stem seal is reliable. When the ball valve is opened and closed, the valve stem rotates but does not lift the movement, the packing seal of the valve stem is not easy to break, and the sealing force of the valve stem inverted seal increases with the increase of the medium.

5.Because PTFE and other materials have good self-lubrication and small friction loss with the ball, the ball valve has a long service life.

6.It can be equipped with a variety of driving mechanisms such as pneumatic, electric, and night action to achieve long-distance control and automatic operation.

7.The valve body channels are flat and smooth, and can transfer viscous fluids, slurries, and solid particles.

8.It is easy to install and can be installed in any part of the pipe in any direction.

The plastic float valve has the function of automatically opening and closing the pipeline to control the water level. This valve is made of high-quality copper, which is small in size and easy to install, high in sensitivity, small in head loss, and free in water hammer, which can greatly improve the utilization rate of water tower (pool).

The small orifice float valve has the function of automatically opening and closing the pipeline to control the water level. This valve is made of high-quality copper, its small size is easy to install, high sensitivity, small head loss, no water hammer phenomenon, can greatly improve the utilization rate of water tower (pool), for the new water tower (pool), due to the great reduction of the float volume, and make the water tower (pool), the upper part should be left to the float to float freely The required height is also correspondingly reduced, reducing the cost of the water tower (pool), it overcomes the old-fashioned rod float valve is large, easy to damage, unreliable work and a large number of water problems. It is the latest type of valve for automatic water level control of your ideal water tower (pool), and it is suitable for replacing the old float valve for the existing water tower (pool) and the replacement product rotary lobe pump.

The function of stainless steel float valve and plastic float valve is almost the same, but the stainless steel float valve is much higher than that of plastic float valve, ranging from 12 to 75 yuan, which should be related to the service life of both of them. The first small hole float valve is directly proportional to its advantages, the most expensive is as high as 800 yuan, and the cheapest is 35 yuan.

Are you talking about ball valves manual or automatic? The manual one is only a valve body and handle, the large-caliber one is used for a turbine, the valve body is composed of a valve core, a valve seat and a valve stem, and the automatic one is a cylinder or electric head above the valve body below, and the pneumatic one also has accessories such as solenoid valves and triplets.

The ball valve is composed of the valve body, the ball, the valve seat, the valve stem, the bracket and the driving device.

Working principle: The working principle of the ball valve is to make the valve unblocked or blocked by rotating the valve. The ball valve switch is lightweight, small in size, can be made into a large diameter, reliable sealing, simple structure, easy maintenance, the sealing surface and the spherical surface are often in a closed state, not easy to be eroded by the medium, and have been widely used in various industries.

Classification: 1. By function.

1) Bypass valve: The ball valve is generally opened by static water, so the bypass valve is flattened first, that is, both sides are filled with water;

2) Air valve: when filling with water, remove the air and take the float to close the valve by itself; When draining, the air is supplemented, and the pontoon descends on its own;

3) Pressure relief valve: when opening and closing the valve, remove the pressure water between the valve and the sealing cover to avoid wearing the sealing cover;

4) Sewage valve: discharge the sewage from the lower and lower parts of the spherical shell.

2. Press the transmission.

1) Pneumatic ball valve.

2) Electric ball valve.

3) Hydraulic ball valve.

4) Pneumatic and hydraulic ball valves.

5) Electro-hydraulic ball valve.

6) Turbo drive ball valve.

Advantages: 1. The fluid resistance is small, and the full-bore ball valve basically has no flow resistance.

2. Simple structure, small size and light weight.

3. Close and reliable. It has two sealing surfaces, and the sealing surface material of the ball valve is widely used in various plastics, which has good sealing performance and can achieve complete sealing. It has also been widely used in vacuum systems.

4. Easy to operate, fast opening and closing, from full open to full closed, as long as the rotation is 90°, which is convenient for long-distance control.

5. It is easy to maintain, the structure of the ball valve is simple, the sealing ring is generally movable, and it is more convenient to disassemble and replace.

6. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and the erosion of the sealing surface of the valve will not be caused when the medium passes.

7. Wide range of application, from small to a few millimeters, as large as a few meters, from high vacuum to high pressure can be applied.

8. Because the ball valve has wiping properties in the opening and closing process, it can be used in the medium with suspended solid particles.