A question regarding the low-pressure side of the differential pressure level gauge
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This post was last edited by Yiming on 2016-4-12 at 17:05. What are the translations for these two professional Chinese terms: INSTRUMENTS WITH A DRY REFERENCE LEG and INSTRUMENTS WITH WET REFERENCE LEG? What is the difference between them? Please help me understand, experts{:3_57:}
Gas/liquid measurement tube. To measure the liquid level, + indicates that P changes as the liquid level changes, while – requires that the pressure transducer tube remain filled with either a gas phase or a liquid phase in order to keep P relatively constant; therefore, in reference E, the – tube is called the REFERENCE LEG. For example, measuring the level of water at room temperature corresponds to the DRY LEG, while measuring a steam drum corresponds to the WET LEG. All filler pipes are WET LEG and require negative migration.
Gas/liquid measurement tube. To measure the liquid level, + indicates that P changes as the liquid level changes, while – requires that the pressure transducer tube remain filled with either a gas phase or a liquid phase in order to keep P relatively constant; therefore, in reference E, the – tube is called the REFERENCE LEG. For example, measuring the level of water at room temperature corresponds to the DRY LEG, while measuring a steam drum corresponds to the WET LEG. All filler pipes are WET LEG and require negative migration.
1. Is it classified based on the medium filled inside the pipe? 2. From what you said, my understanding is that the medium inside the pipe is distinguished according to the properties of the medium being measured – for example, corrosive or condensable media. Does this mean that the pipe must be filled with a liquid phase, in other words, a WET LEG? It’s a bit confusing
1. Yes. 2. A negative leg contains fluid, whether it is a self-curing fluid or a filling fluid; this is what is referred to as a WET LEG. That’s what foreigners mean: DRY LEG: no migration or positive migration; WET LEG: negative migration.
Thank you. I’ve been quite busy lately and didn’t have time to reply: lol
Expert! This translation is very accurate and reasonable……