Problems with the valve
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Please explain in detail which types of valves can be used to regulate flow
Original poster: First of all, the question isn’t clear enough – is it manual adjustment or automatic adjustment? Manual: Globe valves, stop valves, gate valves are all suitable. Automatic: Control valves, stop valves, and so on
Among the commonly used valves, globe valves are used to regulate flow, while ball valves and gate valves are generally used for opening and closing.
The last edit to this post was made by Benbenxuan on 2010-4-23 at 14:39. Speaking specifically of the valve body in control valves, most of them are of the globe valve type; their sealing mechanism ensures that their regulation performance is the best among other types of valves! Valves such as ball valves and butterfly valves are claimed to be capable of adjustment, but the effect of this adjustment is far from satisfactory; there is no real precision in it.
Globe valve, gate valve, plug valve, control valve
Ball valves, globe valves, gate valves, and butterfly valves can only roughly regulate flow rate. It is better to choose a control valve
For the relevant representation methods, refer to the standard: HG 20559.3-1993 Piping and Instrumentation Diagrams – Graphic Symbols for Pipes and Fittings
Manual stop valves and needle valves can be used to regulate flow, while automatic control is achieved using pneumatic or electric control valves.