Instrument selection
Thread Content
When selecting a gauge, it is necessary to know the medium and its state, but how are the pressures before and after the valve determined – is experience required for that?
The pressures before and after the valve are specified by the process requirements. In addition, it is necessary to know the type of operation for the valve – whether it operates on air pressure, on vacuum, in a proportional manner, or otherwise – as well as the material of the valve body, the valve core, the sealing method, and the leakage level. These factors are primarily determined by the process; if you’re not sure, you can ask them.
I need to design a control scheme for a distillation tower; I’m not quite sure about the selection of instruments and measurement points – how should I determine these? ? ? ?