Steps for putting the flowmeter into use
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For flow meters that are newly installed or put into operation after pipeline maintenance, they should be commissioned in the order of (first opening the bypass valve, then the valve upstream of the flow meter, followed by the valve downstream of the flow meter, and finally gradually closing the bypass valve). May I ask everyone: why is it necessary to open the valve upstream of the flow meter first, and then the valve downstream of it?
To ensure that the material completely fills the flow meter, accurate measurements can be obtained by the flow meter. If the downstream valve is opened first, the material may not fill the flow meter
This is also the case for split-flow meters; in rotor flow meters, it is usually necessary to open the downstream side first, to avoid excessive impact on the float that could cause jamming
Before asking this question, you can try it on the device. You’ll know right away which one to use! :)
This is the **professional assessment question bank’s
Opening the upstream valve first and then the downstream valve is to prevent the pipeline from being empty. Open the downstream valve first; once the medium flows away, the pipe will be empty.
The newly installed electromagnetic flowmeter doesn’t have a bypass, and my measurements aren’t accurate right now. What’s the reason for this?