What type of valve is generally suitable for draining pipes?
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What type of valve is generally suitable for draining pipes? For valves such as ball valves, globe valves, and gate valves, what type of valve is generally suitable for draining steam pipes?
Ball valves or globe valves can generally be used to drain pipes. This is because ball valves feature a simple structure and good sealing performance, allowing them to quickly shut off the fluid in pipelines ； A globe valve, on the other hand, can precisely control flow and completely shut off the fluid in the pipeline, while also maintaining good sealing properties. For draining steam pipes, valves that can withstand high temperatures and pressures should be selected. Therefore, high-temperature-resistant valves such as metal-sealed gate valves or butterfly valves are generally chosen as drain valves for steam pipelines. .
This should also be related to the medium inside your pipeline, right?
Metal seals don’t really enable containers to achieve zero leakage; are gate valves prone to leaking?
When the medium is water: it is best to use two valves for drainage. The first valve should be a gate valve of the Z41H series; its advantage is that it allows for thorough cleaning of the pipes, but its disadvantage is that it may experience slight internal leakage, meaning it does not seal properly. The second valve is a ball valve with tight sealing. Other media: gate valve + gate valve or gate valve + other. The above is the default flange connection method
The steam pipeline drain valve is a globe valve; using other types of valves can lead to internal leakage and poor sealing.
The Hardware Manual contains the selection principles for various types of valves; you might take the time to read it. If possible, go to the power station and areas with boilers and steam pipes to get a firsthand understanding. :lol