The flow rate of the orifice plate flow meter decreases
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Orifice plate flow meter – suitable for liquid media, with excellent heat insulation and heating capabilities! ! But the reading will drop to zero in just a short while (at most half an hour)! A negative pressure difference has already been detected at the site! ……The traffic volume is relatively low, but it has remained stable at least, without dropping to zero at any point! The flow rate shows normal after discharge, but it drops again after a while! The interval is very short! ! You can’t just go to the site every half hour to discharge waste – what exactly is going wrong in this process? ? The zero point is quite accurate! I just found it! Waste discharge doesn’t get clogged either! The material doesn’t appear to have any obvious impurities! !
Check whether the pressure guide tube is blocked or leaking.
Tell me about your installation method: is the orifice plate installed as a single unit or in separate parts?
It’s not blocked! ! Nothing was missed either! ! ……
No blockage and no leaks! ! Waste discharge is smooth! ! ……
I don’t understand what you mean by separate and integrated… This orifice plate is installed with flanges; pressure is taken from these flanges, and the pressure tubes lead to the differential pressure transmitter below! ! That’s exactly it
The range is 30; under normal conditions it’s 6-7, and sometimes it drops to 3-4.! But recently it drops to 0 very frequently and doesn’t recover! On-site inspection shows that the differential pressure of the differential pressure transmitter is already negative!
Was it good all along, and only became bad later? I think it’s a problem caused by the pressure tapping pipes; in some cases, the route of these pipes, their bends, and the height of those bends can affect the proper functioning of the instruments. As you said, the issue is resolved once the waste fluid is removed – it might be due to the pressure tapping pipes, or it could be related to the orientation in which the transmitter is installed. I suggest you modify the pressure tapping pipes and lay them out again
It can’t be a problem with the heat tracing; the pressure tap pipe has vaporized in some areas
Keep queuing. If it drops to zero, it gets queued. It’s just a queue. It will be fine after two months of waiting