Dual-flange dual-capillary differential pressure transmitter
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Double-flange double-capillary differential pressure transmitter: Which installation position for the gauge, 1, 2, or 3, is correct? What are the issues and reasons for the errors? Please ask an expert for a detailed explanation
Due to the effect of gravity in capillaries, 1 is the only suitable option; it is also the installation method recommended in many manuals!
Either one is fine. It does not affect the measurement. https://bbs.hcbbs.com/home.php?mod=space&uid=816911&do=blog&quickforward=1&id=68793
The last edit to this post was made by 1111111 on 2019-2-1 at 20:14. When focusing solely on pressure transmission and ignoring the inherent defects in the sensor’s technical performance, Figure 1 is applicable in general. In Figures 2 and 3, the pressure difference across the liquid column can be measured effectively only when the gas phase pressure in the storage tank remains above a certain value. Taking Figure 3 as an example, when the vapor pressure = 0 kPaG, whether the liquid column in the storage tank increases or decreases, the differential pressure detected at the sensor diaphragm remains unchanged and stays at 0 kPa. Why? Because the gravitational pressure of the liquid column is directed vertically toward the center of the Earth, when (P_air + P_liquid) < P_oil, the pressure does not reach the sensor diaphragm. .
Apart from the 3 not recommended ones, 1-2 are fine
Apart from the 3 not recommended ones, 1-2 are fine
Except for 3, it is not recommended. 1.2 is fine
Apart from the 3 not recommended ones, 1-2 are fine