It is very important to have a basic knowledge of the industrial performance requirements of valves, which will make it easier for us to select valves. It is recommended that the following five points should be keep in mind before starting selecting valves:
1. Valve sizes and types
It should be pointed out that the valves in industrial equipment should perform multiple functions such as cuting off flows, transfering flows, mixing flows, pressure relief, preventing backflows and regulating flows. For example, in a water supply pipe, a globe valve is used to control the flow of water. For the line with 16 inch, full line size butterfly valves should be used. The maximum speed through the valve is normally limited to 12 feet per second and should not exceed 20 feet per second.
2. Manufacturing materials
Before valve selection, attention should be paid to the chemical compatibility requirements for industrial equipment. The materials used in the manufacture of valves shall be compatible with the gases and other media flowing through them. For example, valves made from copper alloys are a popular choice for oil and gas production. Plastic valves are generally more resistant to corrosion and chemical corrosion than metal valves.
In the survey of valve users, it was found that 80% of users chose corrosion-resistant materials such as stainless steel (27.2%), brass or bronze (24.1%) or plastic (18.2%).
3. Performance requirements
Metal alloys are generally recommended in industries that have high temperature and high pressure. Metal valves are also most suitable for pressurized gas.
4. Check valves have special requirements.
Most of the time, the check valve can work as expected. However, it is still recommended that the response time and opening pressure required to open the valve should be checked. Some types of check valves require positive downstream pressure to open.
5. Maintenance
It is necessary to perform regular maintenance for valves in industrial equipment. This is important for valve reliability and application stability. For example, ball valves can prevent clogging, but at the same time, they are not suitable for regulating flows. Using ball valves to control flows can cause leakage or premature failure. The type of valve connection affects the function of the system and process. Each connection type has its own advantages and disadvantages.
1. Valve sizes and types
It should be pointed out that the valves in industrial equipment should perform multiple functions such as cuting off flows, transfering flows, mixing flows, pressure relief, preventing backflows and regulating flows. For example, in a water supply pipe, a globe valve is used to control the flow of water. For the line with 16 inch, full line size butterfly valves should be used. The maximum speed through the valve is normally limited to 12 feet per second and should not exceed 20 feet per second.
2. Manufacturing materials
Before valve selection, attention should be paid to the chemical compatibility requirements for industrial equipment. The materials used in the manufacture of valves shall be compatible with the gases and other media flowing through them. For example, valves made from copper alloys are a popular choice for oil and gas production. Plastic valves are generally more resistant to corrosion and chemical corrosion than metal valves.
In the survey of valve users, it was found that 80% of users chose corrosion-resistant materials such as stainless steel (27.2%), brass or bronze (24.1%) or plastic (18.2%).
3. Performance requirements
Metal alloys are generally recommended in industries that have high temperature and high pressure. Metal valves are also most suitable for pressurized gas.
4. Check valves have special requirements.
Most of the time, the check valve can work as expected. However, it is still recommended that the response time and opening pressure required to open the valve should be checked. Some types of check valves require positive downstream pressure to open.
5. Maintenance
It is necessary to perform regular maintenance for valves in industrial equipment. This is important for valve reliability and application stability. For example, ball valves can prevent clogging, but at the same time, they are not suitable for regulating flows. Using ball valves to control flows can cause leakage or premature failure. The type of valve connection affects the function of the system and process. Each connection type has its own advantages and disadvantages.
Next: The Differences of Three Kinds of Common Stainless Steel Valves
Previous: Notes for the Use of Electric Ball Valves
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