What is the difference between a ball valve and a stopcock valve, and what is the difference between

The plug valve is generally oil-free, because most of his sealing surfaces are iron. Oh.

Plug valves use a plug with a through-hole as a valve for opening and closing. The rotates with the stem to achieve opening and closing. Small, unpacked, plug valves are also known as "cockers".

The plug of the plug valve is mostly a cone (there is also a cylindrical body). It is matched with the conical orifice surface of the valve body to form a sealing pair. Plug valves are mainly divided into two-way plug valves, three-way plug valves, hard seal plug valves, flip oil seal plug valves, balanced plug valves, high-pressure plug valves, low-temperature plug valves, etc.

A, also known as a turner, is a quick-opening valve. According to its diversion, it is divided into straight-through, three-way, four-way, etc. The straight-through type controls the flow of the medium on the straight pipe section, and the three-way and four-way types can be used to distribute the medium and change its flow direction.

The working principle of the is that the plug body rotates around the center line of the valve body, and the corresponding relationship between the ports on the plug body and the ports at both ends of the valve body is used to achieve the purpose of opening and closing.

Features and benefits of plug valves.

The main features and benefits of plug valves are as follows:

1.The plug valve is used for frequent operation and opens and closes quickly and lightly.

2.The plug valve has low fluid resistance.

3.The plug valve has a simple structure, relatively small size, light weight and easy maintenance.

4.It is not limited by the installation direction, and the flow direction of the medium can be arbitrary.

5.No vibration, low noise.

6. The plug valve is mainly used in the pipeline to cut off, upgrade and change the flow direction of the medium. It is easy to adapt to multi-channel constructions, so that one valve can have two, three, or even four different flow channels, which can simplify the design of the piping system, reduce the number of valve gates, and some of the connection accessories required in the equipment.

7. The plug valve is the earliest valve part that has been adopted by people in history. Due to its simple structure, quick opening and closing (the opening and closing action can be completed by rotating the plug 1 4q turn), easy operation, and low fluid resistance, it is still widely used today. At present, it is mainly used in the case of low pressure, small diameter and low medium temperature.

Therefore, the advantages of the plug valve are that it is easy to operate, quick to open and close, small resistance, large flow, simple structure and small dimensions; The disadvantage is that the contact surface between the plug body and the valve seat is large, which is easy to wear and leak and cause poor sealing and difficult maintenance. The spool may be deformed at high temperatures and can easily get stuck at high temperatures and pressures.

1. The plug valve is used for frequent operation, and the opening and closing are fast and light.

2. The fluid resistance of the plug valve is small.

3. The plug valve has a simple structure, relatively small size, light weight and easy maintenance.

4. Good sealing performance.

5. It is not limited by the installation direction, and the flow direction of the medium can be arbitrary.

6. No vibration, low noise.

Plug valve and ball valve are widely used, and the scope of application and functional characteristics are relatively similar, so what is the difference between plug valve and ball valve? Let's start with how they work.

How plug valves and ball valves work:

Ball valve: It is evolved from the plug valve, and its opening and closing part is a ball, which uses the ball to rotate 90° around the axis of the valve stem to achieve the purpose of opening and closing. The ball valve is mainly used on the pipeline to cut off, distribute and change the direction of the flow of the medium, and the ball valve designed with a V-shaped opening also has a good flow regulation function.

Plug valve: refers to a rotary valve in the shape of a plunger with a closing piece, and the channel port on the valve plug is communicated or separated from the channel port on the valve body through 90° rotation to realize the opening or closing. The plug can be shaped cylindrical or conical.

Its principle is basically similar to that of the ball valve, which is based on the plug valve, which is mainly used for oil field exploitation and petrochemical industry.

What is the difference between a stopcock and a ball valve?

When used for shut-off, the plug valve has a slightly better adjustment ability than the ball valve, but the advantages are limited, because the sealing surface of the plug valve is much larger than the ball valve, the sealing effect is good, so the twist and match change torque is also too large, the action is not flexible enough, and the conventional positive plug structure is difficult to achieve a large diameter due to the influence of the weight of the plug itself.

Although the sealing effect of the ball valve is slightly worse in theory, it can be made into a large diameter, and with the improvement of processing accuracy and sealing materials, the sealing effect of the ball valve can well meet the requirements of practical application, and the application range is wider. When used for adjustment, the two are not much different, and appropriate holes can be made in the rotating body for adjustment.

Here are some of the well-known brands recognized in the plug valve industry that are widely recognized and have a very high reputation. While the ranking of upgraders varies depending on time and market conditions, the following brands are often considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, 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.

1. The plug valve is a valve with simple structure and quick opening and closing, and relatively small resistance. When the handle of the plug valve is parallel to the valve body, it is the full opening position, and when the handle of the plug is perpendicular to the valve body, it is the fully closed position, so the plug valve generally cannot be used as a regulating valve.

2. The plug valve, also known as the pivot door, is a kind of quick-opening valve. Plug valves are generally classified according to their shunts, which can be divided into straight-through, three-way, four-way and other plug valves. The straight-way plug valve is generally used to control the flow of the medium on the straight pipe section, and the three-way plug valve and the four-way plug valve are generally used to distribute the medium and change the flow direction of the medium.

3. The working principle of the stopcock is that the stopcock body of the stopcock valve rotates around the key balance center line in the valve body, and the corresponding relationship between the mouth on the stopcock body and the mouth at both ends of the valve body is used to achieve the purpose of opening and closing.

Haidun valve answers for you:

A ball valve is a common type of valve whose main feature is to control the on/off of the fluid by rotating the ball. The ball valve consists of a ball with an orifice and a valve body, which is rotated to align or close the orifice with the flow channel, thus achieving fluid control.

The working principle of the ball valve is as follows:

1.Open: When the ball valve is open, the ball is rotated to a specific angle to align the orifice in the ball with the flow channel in the valve body. The fluid can smoothly pass through the orifice of the ball and the flow path of the valve body, and the channel can be opened.

2.Closed: When the valve needs to be closed, the ball continues to rotate to a specific angle so that the hole in the ball is no longer aligned with the flow channel in the valve body. At this time, the surface of the sphere seals the flow path of the valve body, blocking the flow of fluid.

Ball valves. Ball valves typically have the following characteristics:

Haidun V-type ball valve.

1.Quick Switch: The ball valve has a fast response time by rotating the ball for fast opening and closing operation. Congratulatory talks.

2.Good sealing performance: Due to the small contact surface between the ball and the valve body, the ball valve usually has good sealing performance, which can effectively prevent the leakage of the medium.

3.Low flow resistance: When the ball valve is open, the orifice in the ball body is aligned in a straight line with the flow channel of the valve body, and the flow path of the fluid is smooth, the flow resistance is low, and the pressure loss is small.

4.Adjustable flow rate: By rotating the angle of the ball, the size of the channel through the ball valve can be adjusted to achieve the adjustment of the flow rate.

Ball valves are widely used in various industrial fields, such as chemical, oil, natural gas, water treatment, etc., especially for occasions that require fast switching and flow regulation.