Why are check valves installed at the sampling points?
Thread Content
I’m curious, how is sampling done? The drawing is as shown
The main purpose of installing a check valve at the sampling point is to prevent the sample from being contaminated or impurities from entering the sampling pipeline. Since samples usually need to be analyzed and tested, failure to take appropriate measures during sampling can lead to inaccurate results or misjudgments. Regarding how to take samples, in general, samples can be obtained by opening the valve at the sampling point. After ensuring that the valve is closed, the sample in the pipeline can be collected into a container or test tube using specialized equipment or manually, while trying to prevent air from entering the pipeline. Of course, it is also necessary to ensure that the sampling equipment is clean before sampling, and to strictly follow the operating procedures and safety protocols. In the scenario shown in the drawings, it can be inferred that samples of the liquid medium need to be collected at this sampling point; therefore, installing a check valve can effectively prevent backflow of the medium, thereby improving the quality of sampling. .
Can samples be taken from this diagram according to the flow direction of the fluid? It’s better to be more detailed, thank you :)
Is this flow going back to the main pipeline from the sampling point? Is it reversed?:o
Can’t understand it? It’s not possible to obtain samples this way, so it’s best to ask the person who proposed it