The main sources of measurement errors of V-cone flowmeters are caused by improper installation, untimely maintenance, or changes in process system operating parameters. The technicians of Dongxiang Instrument will summarize the incorrect operation of the V-cone flowmeter .
1. The first is irregular installation
There are several main reasons for the irregular installation of V-cone flowmeters in the field: the lack of straight pipe sections before and after the process pipeline causes fluid instability and affects the measurement accuracy; there are problems with the installation direction. Of course, this problem will not happen Unless it is caused by an error in the field installation; when measuring steam, the condensing device does not cool down completely and the installation height varies
2, followed by the misoperation of the secondary instrument
When the V-cone flowmeter is used in the field, a differential pressure transmitter must be equipped for normal use. Therefore, the performance and installation of the differential pressure transmitter directly affect the overall accuracy of the V-cone flowmeter. The V-cone flowmeter still has successful operation experience in measuring mixed fluids, but it is necessary to pay attention to the corrosion protection of the differential pressure transmitter and periodically open the drain valve.
3, the final impulse tube is blocked or leaking
When measuring viscous and crystalline media, the pressure guiding tube and the shut-off valve are often blocked due to heat tracing and other reasons, which causes the differential pressure value input to the differential pressure transmitter to change, resulting in measurement errors. Elimination methods are to conduct inspections on time, clean the sewage or clean with a hand pressure pump.
When measuring high-pressure or corrosive media, pressure leaks or joints often leak, causing pressure loss and differential pressure deviation. The solution is to conduct inspections on time and plug the loopholes.
Through the above description, our on-site maintenance technicians can easily find the fault of the V-cone flowmeter and reduce the economic loss on site.