Valve leakage issue
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Can an electric control valve be used as a stop valve? A colleague told me that globe valves require an even lower leakage rate, so it’s best to add another globe valve near the electric control valve. Are there any standards for valve leakage? Thank you all.
Your control valve itself might be a globe valve
See what kind of electric valve it is; an electric valve consists of an electric actuator plus a valve, and the valve can be a butterfly valve, globe valve, ball valve, etc
A electric globe valve will do: lol
It seems like your description of this control valve is too vague
Regulating valves of the globe valve type have a relatively high leakage rate; if required, specific leakage rate specifications can be specified at the time of ordering, and sealing performance comparable to that of conventional globe valves can also be achieved. The purpose of installing stop valves and other on-off valves before and after the control valve is to enable isolation of the valve when it needs to be taken apart for maintenance.
The leakage level of the control valve is slightly worse than that of the shut-off valve
Regulating valves and globe valves have different pressure testing standards; the leakage requirement for regulating valves under these standards is higher than that for globe valves. Generally, regulating valves cannot be used as shut-off valves in pipelines
Valves themselves have leakage ratings; as long as those requirements are met, no additional valves are needed
Electric control valves are selected based on the operational requirements, with a variety of valve bodies available. A manual valve can be added next to the electric valve for maintenance purposes
Control valves cannot be used as stop valves; stop valves are required to have zero leakage, while this is not an issue with control valves