Can the EJA120 differential pressure transmitter be used to measure the flow rate of oxygen at a pressure of 0.8 MPa?
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May I ask: Can the EJA120 differential pressure transmitter be used to measure the flow rate of oxygen at a pressure of 0.8 MPa? For example: when the oxygen pressure is 0.8 MPa and the differential pressure value calculated from the oxygen flow rate is 500 Pa, the EJA120 differential pressure transmitter is selected. The maximum pressure that the EJA120 differential pressure transmitter can handle is 50 KPa – is this sufficient to meet the requirements?
Bro, it’s totally fine – go ahead and use it without hesitation
Based on what the poster has described, the differential pressure transmitter of the EJA120 is more than capable of meeting the requirements
The index should be between 1/3 and 2/3 of the range, I guess
No, the voltage tolerance level is not sufficient; it’s prone to damage
It cannot be selected for the following reasons: 1. When initially equipping flow meters, it is best not to use a design pressure difference that corresponds to the meter’s maximum range; some margin of flexibility should be left, as the calculated range is often just an estimate. In actual use, adjustments must be made based on the actual conditions in order to achieve the best detection performance. 2. The pressure rating of this model of differential pressure transmitter is insufficient. This post was last edited by ZZD109 on 2009-4-19 10:37.]
Your differential pressure value is 500 Pa, with a differential pressure range of 50 kPa and a ratio of 100:1, which meets the requirements fully. (If the range ratio were smaller, the accuracy would be better.) As for the issue of maximum pressure that can be sustained in one direction, manufacturers have increased the pressure resistance; in your case, the maximum pressure in one direction is around 25 bar or even higher. I suggest to LZ that it’s better to use Rosemount, Honeywell, or E+H – they are all imported brands. Why choose a Japanese brand? The Chinese people must never forget their history of humiliation and the current Diaoyu Islands issue.
Thank you all: but the sales representative from EJA said that the maximum pressure for the EJA120 is 50 KPa
It can fully meet the requirements, as what is measured here is flow rate rather than pressure. Flow rate is proportional to the square root of the differential pressure. In the case of relative differential pressure flow meters, the differential pressure is very low, far below 0.8 MPa. Moreover, the pressure resistance of the positive and negative pressure chambers is also greater than 0.8 MPa; therefore, it’s safe to use this device
I don’t know what the voltage rating of the EJA120 is It would be great if you could send over the manual for the EJA120.
The technical staff from EJA said that the maximum pressure for the EJA120 is 50 KPa, so it cannot be used
It should not be possible to use it. 1. The maximum static pressure that the gauge can withstand. Can it meet the requirements? It seems that it cannot meet the requirement 2; the differential pressure value is 500 Pa, while the differential pressure range is 50 kPa with a ratio of 100:1, which is sufficient to meet the requirements. The smaller the range ratio, the better the precision and the more accurate the measurements. I agree with what was said above (this is just my personal opinion for reference only)
The range of a flow differential pressure transmitter is determined based on the dimensions of the throttling element and the process conditions; the pipeline pressure value is merely one parameter in this calculation process. Nowadays, when selecting a throttling element, efforts are made to minimize pressure losses, which means that the range of the differential pressure transmitter chosen is usually below 50 kPa. Once the design is finalized, the range of the differential pressure transmitter remains fixed and cannot be changed
No, the maximum pressure tolerance of the EJA120 is 50 KPa; although its differential pressure range meets the requirements, it cannot withstand the operating pressure