The working principle and practical application of cast steel ball valves
Addtime：2022-09-09 From： View：427
Introduction:
The cast steel ball valve was invented in the 1950s. With the rapid development of science and technology and continuous improvements in production processes and product structures, within just 40 years, it has rapidly become one of the main types of valves. In industrialized countries in the West, the use of ball valves is increasing year by year. In China, ball valves are widely used in industries such as petroleum refining, long-distance pipelines, chemical engineering, papermaking, pharmaceuticals, water conservancy, power, municipal services, and steel manufacturing. They hold a crucial position in the national economy.
A ball valve can be closed tightly by rotating 90 degrees with a very small torque. The completely equal valve inner cavity provides a medium with very little resistance and a straight-through flow path. It is generally believed that ball valves are most suitable for direct opening and closing, but recent developments have made them capable of throttling and controlling flow. The main features of ball valves are their compact structure, ease of operation and maintenance, and suitability for general working media such as water, solvents, acids, and natural gas. They are also suitable for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane, and ethylene. The valve body of a ball valve can be either integral or modular.
Working principle:
The working principle of the cast steel ball valve is to make the valve open or closed by rotating the valve stem. The ball valve is easy to operate, has a small size, and can be made with a large diameter. It has reliable sealing, a simple structure, is easy to maintain, and the sealing surface and the spherical surface are often in a closed state, which is not easily eroded by the medium. It is widely used in various industries.
Ball valves and plug valves belong to the same type of valve. The only difference is that the closing element of the ball valve is a spherical body, and it rotates around the center line of the valve body to achieve opening and closing.
Practical application:
In pipelines, ball valves are mainly used for cutting off, distributing, and changing the flow direction of the medium. The ball valve is a new type of valve that has been widely adopted in recent years. It has the following advantages:
1. The resistance of the fluid is small, and its resistance coefficient is equal to that of the same length of pipe section.
2. The structure is simple, the volume is small, and the weight is light.
3. It is tight and reliable. The sealing surface material of the ball valve is widely used in plastics, and the sealing performance is good. It has also been widely used in vacuum systems.
4. It is easy to operate, and from fully open to fully closed, only a 90° rotation is required, which is convenient for remote control.
5. Maintenance is convenient. The structure of the ball valve is simple, and the sealing ring is usually movable. It is relatively convenient to disassemble and replace.
6. When fully open or fully closed, the sealing surface of the ball and the valve seat are isolated from the medium, and the medium will not cause erosion of the valve sealing surface.
7. The application range is wide. The diameter can range from a few millimeters to several meters, from high vacuum to high pressure, and can be applied.
Ball valves have been widely used in various departments such as petroleum, chemical industry, power generation, papermaking, atomic energy, aerospace, rockets, etc., as well as in people's daily lives.
The cast steel ball valve was invented in the 1950s. With the rapid development of science and technology and continuous improvements in production processes and product structures, within just 40 years, it has rapidly become one of the main types of valves. In industrialized countries in the West, the use of ball valves is increasing year by year. In China, ball valves are widely used in industries such as petroleum refining, long-distance pipelines, chemical engineering, papermaking, pharmaceuticals, water conservancy, power, municipal services, and steel manufacturing. They hold a crucial position in the national economy.
A ball valve can be closed tightly by rotating 90 degrees with a very small torque. The completely equal valve inner cavity provides a medium with very little resistance and a straight-through flow path. It is generally believed that ball valves are most suitable for direct opening and closing, but recent developments have made them capable of throttling and controlling flow. The main features of ball valves are their compact structure, ease of operation and maintenance, and suitability for general working media such as water, solvents, acids, and natural gas. They are also suitable for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane, and ethylene. The valve body of a ball valve can be either integral or modular.
Working principle:
The working principle of the cast steel ball valve is to make the valve open or closed by rotating the valve stem. The ball valve is easy to operate, has a small size, and can be made with a large diameter. It has reliable sealing, a simple structure, is easy to maintain, and the sealing surface and the spherical surface are often in a closed state, which is not easily eroded by the medium. It is widely used in various industries.
Ball valves and plug valves belong to the same type of valve. The only difference is that the closing element of the ball valve is a spherical body, and it rotates around the center line of the valve body to achieve opening and closing.
Practical application:
In pipelines, ball valves are mainly used for cutting off, distributing, and changing the flow direction of the medium. The ball valve is a new type of valve that has been widely adopted in recent years. It has the following advantages:
1. The resistance of the fluid is small, and its resistance coefficient is equal to that of the same length of pipe section.
2. The structure is simple, the volume is small, and the weight is light.
3. It is tight and reliable. The sealing surface material of the ball valve is widely used in plastics, and the sealing performance is good. It has also been widely used in vacuum systems.
4. It is easy to operate, and from fully open to fully closed, only a 90° rotation is required, which is convenient for remote control.
5. Maintenance is convenient. The structure of the ball valve is simple, and the sealing ring is usually movable. It is relatively convenient to disassemble and replace.
6. When fully open or fully closed, the sealing surface of the ball and the valve seat are isolated from the medium, and the medium will not cause erosion of the valve sealing surface.
7. The application range is wide. The diameter can range from a few millimeters to several meters, from high vacuum to high pressure, and can be applied.
Ball valves have been widely used in various departments such as petroleum, chemical industry, power generation, papermaking, atomic energy, aerospace, rockets, etc., as well as in people's daily lives.