Wenzhou Unique Valve Co., Ltd.
The Common Valves Used in the Chemical Design
Jun 28, 2021
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Abstract: various valves are widely used in the production and operation process of chemical enterprises. We can say that a valve is one of the most common but indispensable components in the operation of chemical enterprises. The setting of common valves is very important in the chemical design, which has a certain impact on the healthy and stable operation of the enterprise. To promote the completeness and scientificity of the chemical design, a comprehensive and detailed discussion is carried out concerning the setting of commonly used valves in chemical design. The use value of commonly used valves in chemical design lays a good foundation for the safe and normal operation of chemical pipelines, maximizes the service life of chemical pipelines, and further promotes the maximum economic benefits of chemical enterprises.
A valve is a kind of control device, which is mainly used to control the flow and direction of substances. It is an indispensable component in the pipeline system and a necessary content of the chemical design. With the development of the times and the advancement of technology, the types of valves have become diversified. A comprehensive analysis of valve types and an in-depth understanding of valve selection and the key points and valve setting have a certain significance for the chemical design.
1. Common valves in the chemical design
Valves are classified into metal, non-metal according to materials, and they can be divided into gate valves, throttle valves, safety valves, and pressure reducing valves based on functions.
1.1 Gate valves
To be precise, this valve is a kind of device used to control the passage of the valve. During the operation of the gate valve, the valve spool can be used to control the opening or closing of the valve passage. In the chemical design, the gate valve can be used to cut off or connect the pressure flowing material in the pipeline. In addition to the basic functions, the gate valve also has other advantages and disadvantages. Its advantage is that it has good stability and practicability, and when the gate valve is installed, there is no restriction on the direction and the pipeline design; its disadvantage is that its cost is high and it has a complex structure. In actual chemical design, valves with higher cost performance should be selected according to specific needs.
1.2 Throttle valves
Throttle valves are usually used to control the flow of pipelines, rather than to cut off the internal passages of the pipeline. As far as the valve structure is concerned, this kind of valve is not very different from the globe valve. The most obvious difference between the two is that the throttling effect is achieved by the valve disc for the throttling valve. At the same time, the valve disc has various shapes, and the shape of the valve disc can represent the specific characteristics of the throttle valve. The throttle valve also has its advantages and disadvantages. A throttle valve has the biggest advantages of good adjustability, small sizes and light weights. Its main disadvantage is that its own structure will make the valve spool corrode quickly, which will negatively affect the accuracy conditions. The throttle valve needs to work in high-pressure pipelines, and whether the throttle valve has reliable quality should be judged according to the space inside the valve. If the default space is too narrow, it means that it has certain quality defects. Otherwise, there is no problem with the quality.
1.3 Safety valves
The main function of the safety valve is to protect the safety of the pipeline. In actual use, the reasonable design of the safety valve body can promote the effective control of the pressure of the fluid, ensuring that there will be no excessive pressure problems and the fluid flows normally in the pipeline. Once the fluid pressure inside the pipeline is higher than the safety value, the safety valve will be opened, which will reduce the mass of the fluid entering the pipeline, reduce the internal pressure of the pipeline, and ensure the safe operation of the pipeline. It can be seen that when the internal pressure of the pipeline system is normal, there is no need to use a safety valve, but if overpressure occurs inside the pipeline, the safety valve must be opened immediately to adjust the overpressure of the pipeline to ensure that the function of the safety valve is realized.
1.4 Pressure reducing valves
The main function of this kind of valve is to adjust the pressure. When the chemical pipeline system is designed, it should be noted that the pressure reducing valve cannot be used alone. It should be used in conjunction with a throttle valve and the valve spool is used to adjust the pressure and flow of the fluid substance in the pipeline. In the pipeline system, the pressure reducing valve specifically changes and adjusts the throttling area, so that the flow rate of the fluid substance in the pipeline and the kinetic energy generated by it is controlled, thereby reducing the pipeline's pressure. The use of a pressure reducing valve in the pipeline system can effectively adjust the pipeline's pressure and avoid damage to the pipeline system when the pressure of the fluid in the pipeline is abnormal.
2. Selection of commonly used valves in the chemical design
Under the guidance of the rapid development of science and technology in China, the chemical industry is constantly developing towards intelligence and automation. In the chemical pipeline system, the role of valves is very important, and the types and functions of valves vary. When the chemical design is performed, the corresponding valve should be selected according to the specific needs of the pipeline system to effectively fulfil the valve's function, ensuring the safe and healthy operation of the chemical pipeline system, improving the economic efficiency of chemical enterprises on this basis, and promoting the healthy development of the enterprise.
Although a valve is a very common pipeline component in chemical production enterprises, the specific function and practical significance of the valve are very important for chemical production enterprises. In the design of chemical pipelines, once a wrong selection of a valve occurs, it may not only have a certain negative impact on the production efficiency of chemical products, but may also affect the normal and safe operation of the chemical pipeline, and even cause some accidents. At present, there are unreasonable valve selection and aging problems for many chemical companies, and some unexpected situations have occurred as a result. Part of the reason for this situation is that chemical companies have not fully realized the importance of reasonable use of valves. When the chemical design is performed, if you want to ensure the correctness of valve selection, you must first consider the use of the valve, fully understand the specific requirements for the valve of the pipeline system, and select the corresponding valve according to the specific internal pressure of the pipeline. This requires the designer to be familiar with the actual function of various valves. Only in this way can we ensure the specific selection in combination with the pipeline's requirements and the appropriateness of valve selection. In addition, the designer must also fully consider the type, quality and installation steps of the valve, and after a comprehensive and detailed analysis of various related content, choose the right one, which truly reflects the valve's role in the chemical pipeline system, and gives full play to the valve's role.
A valve is a kind of control device, which is mainly used to control the flow and direction of substances. It is an indispensable component in the pipeline system and a necessary content of the chemical design. With the development of the times and the advancement of technology, the types of valves have become diversified. A comprehensive analysis of valve types and an in-depth understanding of valve selection and the key points and valve setting have a certain significance for the chemical design.
1. Common valves in the chemical design
Valves are classified into metal, non-metal according to materials, and they can be divided into gate valves, throttle valves, safety valves, and pressure reducing valves based on functions.
1.1 Gate valves
To be precise, this valve is a kind of device used to control the passage of the valve. During the operation of the gate valve, the valve spool can be used to control the opening or closing of the valve passage. In the chemical design, the gate valve can be used to cut off or connect the pressure flowing material in the pipeline. In addition to the basic functions, the gate valve also has other advantages and disadvantages. Its advantage is that it has good stability and practicability, and when the gate valve is installed, there is no restriction on the direction and the pipeline design; its disadvantage is that its cost is high and it has a complex structure. In actual chemical design, valves with higher cost performance should be selected according to specific needs.
1.2 Throttle valves
Throttle valves are usually used to control the flow of pipelines, rather than to cut off the internal passages of the pipeline. As far as the valve structure is concerned, this kind of valve is not very different from the globe valve. The most obvious difference between the two is that the throttling effect is achieved by the valve disc for the throttling valve. At the same time, the valve disc has various shapes, and the shape of the valve disc can represent the specific characteristics of the throttle valve. The throttle valve also has its advantages and disadvantages. A throttle valve has the biggest advantages of good adjustability, small sizes and light weights. Its main disadvantage is that its own structure will make the valve spool corrode quickly, which will negatively affect the accuracy conditions. The throttle valve needs to work in high-pressure pipelines, and whether the throttle valve has reliable quality should be judged according to the space inside the valve. If the default space is too narrow, it means that it has certain quality defects. Otherwise, there is no problem with the quality.
1.3 Safety valves
The main function of the safety valve is to protect the safety of the pipeline. In actual use, the reasonable design of the safety valve body can promote the effective control of the pressure of the fluid, ensuring that there will be no excessive pressure problems and the fluid flows normally in the pipeline. Once the fluid pressure inside the pipeline is higher than the safety value, the safety valve will be opened, which will reduce the mass of the fluid entering the pipeline, reduce the internal pressure of the pipeline, and ensure the safe operation of the pipeline. It can be seen that when the internal pressure of the pipeline system is normal, there is no need to use a safety valve, but if overpressure occurs inside the pipeline, the safety valve must be opened immediately to adjust the overpressure of the pipeline to ensure that the function of the safety valve is realized.
1.4 Pressure reducing valves
The main function of this kind of valve is to adjust the pressure. When the chemical pipeline system is designed, it should be noted that the pressure reducing valve cannot be used alone. It should be used in conjunction with a throttle valve and the valve spool is used to adjust the pressure and flow of the fluid substance in the pipeline. In the pipeline system, the pressure reducing valve specifically changes and adjusts the throttling area, so that the flow rate of the fluid substance in the pipeline and the kinetic energy generated by it is controlled, thereby reducing the pipeline's pressure. The use of a pressure reducing valve in the pipeline system can effectively adjust the pipeline's pressure and avoid damage to the pipeline system when the pressure of the fluid in the pipeline is abnormal.
2. Selection of commonly used valves in the chemical design
Under the guidance of the rapid development of science and technology in China, the chemical industry is constantly developing towards intelligence and automation. In the chemical pipeline system, the role of valves is very important, and the types and functions of valves vary. When the chemical design is performed, the corresponding valve should be selected according to the specific needs of the pipeline system to effectively fulfil the valve's function, ensuring the safe and healthy operation of the chemical pipeline system, improving the economic efficiency of chemical enterprises on this basis, and promoting the healthy development of the enterprise.
Although a valve is a very common pipeline component in chemical production enterprises, the specific function and practical significance of the valve are very important for chemical production enterprises. In the design of chemical pipelines, once a wrong selection of a valve occurs, it may not only have a certain negative impact on the production efficiency of chemical products, but may also affect the normal and safe operation of the chemical pipeline, and even cause some accidents. At present, there are unreasonable valve selection and aging problems for many chemical companies, and some unexpected situations have occurred as a result. Part of the reason for this situation is that chemical companies have not fully realized the importance of reasonable use of valves. When the chemical design is performed, if you want to ensure the correctness of valve selection, you must first consider the use of the valve, fully understand the specific requirements for the valve of the pipeline system, and select the corresponding valve according to the specific internal pressure of the pipeline. This requires the designer to be familiar with the actual function of various valves. Only in this way can we ensure the specific selection in combination with the pipeline's requirements and the appropriateness of valve selection. In addition, the designer must also fully consider the type, quality and installation steps of the valve, and after a comprehensive and detailed analysis of various related content, choose the right one, which truly reflects the valve's role in the chemical pipeline system, and gives full play to the valve's role.
