The Selection Principle Of The Globe Valve
Introduction
Globe valves are commonly used in various industries because of their reliability and versatility. The stem axis of the globe valve is perpendicular to the seating seal surface, and its valve stem opening or closing stroke is relatively short. Globe valves are mostly used as a medium for cutting or regulating and throttling use. This blog post will discuss the selection principle of the globe valve and its advantages over other valves.
Advantages of Globe Valve
The most obvious advantages of the globe valve are its wear resistance and smaller opening height. In the opening and closing process, the disc in the valve body sealing surface between the friction is smaller than the valve, making it wear-resistant. The cut-off valve opening height is generally only 1/4 the diameter of the seat passage, which is much smaller than the gate valve. Usually, there is only one sealing surface on the valve body and disc, making the manufacturing process better and convenient for maintenance.
Selection Principle of Globe Valve
The selection principle of the globe valve depends on the application and the medium used. High-temperature and high-pressure medium pipes or devices should choose the cut-off valve, such as thermal power plants, nuclear power plants, and petrochemical systems on high-temperature and high-pressure pipelines. The cut-off valve should be used in pipelines where the flow resistance requirements are lax and there is little consideration of pressure loss. For small valves, needle valves, instrument valves, sampling valves, and pressure needle valves can be chosen.The cut-off valve can also be used for flow adjustment or pressure regulation. However, if the adjustment accuracy request is not high and the pipeline diameter is comparatively small (nominal path ≤50mm), a cut-off valve can be used. In the production of small and large chemical fertilizers in the synthesis industrial production, a nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa high-pressure angle type cut-off valve, or the high-pressure angle type throttle valve should be used. In the alumina Bayer process, where silicon removal workshop is used, the pipeline is easy to coke. A valve body separate, seat can be removed, cemented carbide sealing pair of DC-type globe valve or DC-type throttle valve should be chosen. Lastly, in the urban construction of water supply and heating engineering, the nominal path of the smaller pipeline, such as the nominal flow of less than 150mm pipe, cut-off valve, balance valve, or plunger valve can be chosen.
Conclusion
The globe valve is a reliable and versatile valve that can be used in various industries. The selection principle of the globe valve depends on the application and the medium used. It is important to choose the right valve to ensure efficiency and safety in the pipeline system. By following the guidelines discussed in this blog post, you can make an informed decision when selecting a globe valve.
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