Old-fashioned differential pressure gauge
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I would like to ask: where is the high-pressure inlet of this differential pressure gauge? Where is the low-pressure inlet?
You need to determine the location of this orifice plate on-site first, and then figure out where its interface is...
It looks a bit old, but that’s how they all are in reality. Take a close look at the process.
Newcomers find everything to be \"old\" simply because things are developing too fast: lol
This post was last edited by qugd on 2020-6-27 at 20:54. I think it is a built-in orifice plate type differential pressure transmitter, used for measuring low flow rates. This type of gauge comes out of the factory with the high and low pressure sides already fixed, and the orifice plate is located inside the transmitter; therefore, there may be no obvious markings on the body indicating the high and low pressure sides. Yokogawa Electric, Rosemount, and Yamatake/Honeywell all used to have such products.
The normal instruments will indicate this; if it’s not clear, check the flow direction of the measurement pipeline. Those who study instrumentation must master the process flow. When I used to deal with problems, I would first ask the process supervisor about the flow sequence. Over time, I learned which type of instrument is suitable for which kind of process environment. Additionally, it’s important to read more books and refer to relevant standards.
Look at the side. There are marks H and L
Yes, very comprehensive, thank you! Yokogawa’s