Issues regarding the selection of flowmeters for measuring non-conductive media at small diameters
Thread Content
I’ve encountered a field issue with the following operating conditions: pipe diameter: DN8, medium: dispersant (non-conductive medium), temperature: room temperature, pressure: 1.2 MPa, and flow pattern of the medium: plunger type. A measurement of the medium flow rate is required. Which type of flow meter would you recommend? We have already used target flow meters (which exhibit large fluctuations) and metal float flow meters (which also show fluctuations and discontinuities); the process demands continuous measurement.
Orifice differential pressure flow meter; 10,000 words are omitted below......
I think a flow damper should be added first to stabilize the flow; with such a small diameter, a small buffer tank could even be used. That makes things much easier; the original table can be used.
What’s the traffic volume roughly? The pipe diameter is too small, making measurement difficult; it is also of the plunger type, so large fluctuations are normal. The feeding method is intermittent of the Korean style rather than continuous. Is it possible to make the flow more stable through process improvements?
This post was last edited by Jinling Instruments – Zhu Changling on 2019-2-13 at 14:45. The manufacturing process used in this application results in fluctuations whenever any type of flow meter is used for measurement; we have encountered similar situations when using metal rotors to measure pumps of this type. Changes can only be made on-site to stabilize the flow, which facilitates measurement.
It’s already a plunger pump; why are you complaining about the fluctuations and discontinuities in the flow measurement results? If it’s very stable, then that’s when there’s a problem. If the process permits, it would be better to add a damper and then take measurements, but fluctuations are inevitable.
Use a metering pump directly, without relying on a flow meter for measurement
It’s already a plunger-type feeding system, so the flow rate is bound to fluctuate greatly. If a flow meter must be used, the only option is to add a damper, as suggested by the expert above
This post was last edited by jizhenlin on 2019-2-17 09:24. For plunger pumps, large fluctuations are normal