Device sampler operation
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Is the medium manual valve of the device sampler in a closed state or an open state after sampling?
It is best to consult the on-site technical staff regarding this issue. It is usually turned off, depending on the requirements and the characteristics of the on-site testing equipment. For reference.
Are there specific operating procedures for this?
Are there specific operating procedures for this?
The management required it to be kept closed all the time, but in practice only one valve was left in place, as the operators found it troublesome
Typical samplers have an inlet pipe and an outlet pipe; when sampling is not in progress, the valve for the medium is open, allowing the material to flow. This ensures that the sample taken during sampling reflects the actual conditions of production. If the valve is closed, no flow occurs, and the sample obtained is not representative.
When the valve is not closed and sampling is not being carried out, it becomes a leakage point. If the sampler’s vent cannot be properly sealed, it not only poses a safety risk but also leads to waste.
Normally, they should be kept open at all times to ensure a continuous flow of materials; samples taken from these points should always represent the latest conditions during production. However, due to the generally high leakage rates of existing samplers and the insufficiently timely maintenance of some equipment, certain units have resorted to closing their valves to prevent leaks