What Is The Purpose Of A Stop Valve?

Globe valves are widely used in many industries, especially in the following core areas:
1. Disconnecting fluids
The main function of a globe valve is to interrupt the flow of fluid in a pipeline. When the valve is completely sealed, the disc or valve core will be tightly combined with the valve seat, which can effectively prevent the flow of fluid. This function has shown its key role in many different scenarios, such as:
In the various branch pipelines of the urban water supply system, when the water pipes of a specific household need to be maintained, the corresponding globe valve can be closed to cut off the water flow, so that maintenance personnel can operate more conveniently and will not affect the daily water use of other users.
In the manufacturing process of the chemical industry, for those toxic, harmful or high-value liquid and gas transmission pipelines, the globe valve can quickly disconnect the fluid in an emergency or routine maintenance, thereby preventing environmental pollution or economic damage caused by leakage.
2. Fine adjustment of flow
The globe valve has the function of partially opening to facilitate the adjustment of the flow rate of the fluid in the pipeline. By rotating the handwheel or operating the drive device, we can ensure that the appropriate spacing is maintained between the disc and the valve seat, which allows the fluid to flow through the gap between the disc and the valve seat. Different gap sizes may result in different flow rates. This function becomes particularly critical in situations where fine control of flow is required, such as:
In central heating systems, we can adjust the flow rate of hot water by adjusting the opening state of the stop valve, thereby more effectively controlling the temperature level inside the system.
In the chemical reagent transmission channel in the laboratory, we can accurately adjust the flow rate of the reagent through the stop valve to ensure that the needs of the experiment are met.
3. Prevent fluid backflow
Thanks to the special design of the stop valve, it helps to curb the phenomenon of fluid backflow to a certain extent. When the fluid enters from the bottom of the valve disc and flows out from the top (this is the standard flow direction of the stop valve), when the valve is in the closed state, the pressure of the fluid will press the valve disc tightly against the valve seat, thereby preventing the backflow of the fluid. This function becomes particularly important in situations where the fluid must maintain unidirectional flow, such as:
In the design process of the hydraulic system, the main function of the stop valve is to ensure that the hydraulic oil does not flow back when the system stops or the pressure changes, so as to ensure the stable and safe operation of the system. In the hydraulic lifting system of some large-scale engineering equipment, the main function of the stop valve is to prevent the backflow of hydraulic oil from causing the lifting platform to drop unexpectedly.
4. In the scope of practical application
Due to its unique functions and wide application in various scenarios, the stop valve has played an irreplaceable role in many industrial fields, which covers but is not limited to the following points:
In many industrial fields, such as petroleum, chemical industry, metallurgy and energy, the application of fluid control process is involved. In the oil refining process, the stop valve has the ability to regulate the flow of crude oil; in the chemical industry, we have the ability to regulate the flow of various materials to achieve the purpose of chemical reaction or mixing.
In the construction field, this technology is widely used in the water supply, drainage and fire protection systems of buildings to ensure that these systems can operate stably and safely.
In the energy industry, such as power plants and petrochemical production equipment, it is very important to control the flow of liquid or gaseous substances in order to ensure the safety and efficiency of the entire energy production and transmission process.
Sewage treatment refers to the process of strictly controlling the flow of sewage and the entire treatment process in sewage treatment facilities.
In addition, the stop valve also plays an indispensable role in the aerospace industry due to its excellent sealing performance, low friction between the sealing surfaces when opening and closing, relative durability, low opening height, simple manufacturing and maintenance. As a core component of aerospace equipment, the stop valve undertakes multiple functions such as medium transmission, cutoff and regulation. Its closed nature has a decisive influence on ensuring the stable and reliable operation of aerospace equipment. In short, the stop valve is a type of valve that shows irreplaceable importance in many industrial application scenarios. It is not only powerful, but also very versatile.