Why are globe valves installed on liquefied gas pipelines instead of gate valves?
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Please explain why, in the refining industry, globe valves are used instead of gate valves for liquefied gas pipelines.
Why aren’t there gate valves? There are gate valves, but they are flat gate valves. There’s also a type of cast-iron gas gate valve, which is usually used in buried installations
Gate valves generally have a certain degree of adjustability, and they can also be designed as flow control plugs with various characteristics – such as fast-opening types, as well as those with linear or equal percentage flow responses. Therefore, in theory, it is more ideal to use a gate valve for shutting off flow under such conditions.
Gate valves are still used more frequently; in the absence of any special requirements, gate valves are the ones chosen. Globe valves are mainly used for regulation and throttling purposes.
In the refining industry, gate valves are used for valves on liquefied gas pipelines
Gate valves can regulate flow rate, and they also have good sealing performance
Ball valves are cheaper than gate valves under the same conditions
It depends on the purpose of use: if it is merely for switching on and off, a gate valve is commonly used; if flow regulation is also required, a globe valve is needed.
Gate valves with a cutting function are needed, while globe valves are required to regulate flow
I’m not sure where Brother Lou came across this rule; it seems that gate valves are used quite often. Unless a regulating function is required, gate valves are generally the choice
Reply to 4# wsm1988: Globe valves cannot control flow rate