Are globe valves or gate valves better for steam pipelines?
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The question is as stated in the title. Under the current process conditions, the saturated steam pressure is 0.15 MPa(G), with pipe diameters of DN250, DN350, and DN500. In these conditions, which type of valve is more suitable: a globe valve or a gate valve? Please explain the reason. Then, what type of valve sealing surface is more durable? Are there any specific examples? Thank you
A globe valve is definitely the better choice; it offers good sealing properties. If it needs to remain open all the time, a gate valve can be used, while for situations where it needs to stay closed for an extended period, a globe valve is the best option
Globe valves are useful; butterfly valves are not suitable for steam pipes
This post was last edited by Old Cucumber Painted Green on September 29, 2018, at 09:14. Depending on your operating conditions, gate valves are suitable for being fully opened or closed; however, they shouldn’t be left in a partially open state, as this could damage the gate. Gate valves also result in minimal pressure drop. Globe valves, on the other hand, can be set to a partially open position and offer some degree of regulation, but they cause greater pressure drop and some erosion. In terms of sealing performance, gate valves are superior. Their prices are roughly comparable
Stop valves; in the north, stop valves are simply called air valves
Gate valves are only suitable for pipelines that need to be fully open or fully closed, while globe valves offer a certain degree of regulation. Stop valves are not suitable for vertical installation, especially when the diameter is large
If no adjustment of left-side action is required, gate valves are recommended as they are inexpensive. The stem of the stop valve/policeman switch control valve is prone to leakage
Your question is a bit inappropriate. Different valves have different optimal operating environments, and it cannot be generalized which ones are better and which ones are worse. By selecting the most appropriate valves based on the pipeline usage, the greatest advantages can be achieved. A few fellow travelers upstairs also mentioned it. Suggested for the original poster to refer to.
Globe valves are chosen; for steam media, globe valves are generally the preferred option
Generally, globe valves are used; RF and wound gaskets are employed. If high sealing performance is required, bellows globe valves can be used
It mainly depends on the operating conditions; gate valves are used for full opening and closing, while globe valves have a high pressure drop but allow flow regulation； Seal-type stop valves are good ； However, the current technology for high-temperature gate valves is quite good; it is recommended to purchase high-temperature gate valves from well-known brands, as they are cost-effective and reliable