wedge throttle
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I would like to ask the experts: A new wedge-shaped throttling device has been installed, and is it possible to connect 4 differential pressure transmitters in parallel to measure the flow rate? The positive and negative pressures for these 4 transmitters should be taken from the two pipes associated with the wedge-shaped device’s positive and negative pressures. Thank you!
This post was last edited by white-cg on 2021-4-28 09:40. It’s possible, but when arranging 3+1 = 4 double-flange differential pressure transmitters, thorough consideration must be given to this aspect. It is strongly recommended that for vertical pipe sections, horizontal pressure tapping be used! Ensure 1 set is used for reliable control! The remaining 3 sets are used for 2/3 interlocking – no issues!
It should work; it’s best to choose A+K’s new patented product: the annular wedge flow meter. Its accuracy is 0.5% higher than that of the wedge type, with a repeatability of 0.15%; the range is 10:1. The design aims to create a funnel effect in the flow field, and the symmetry of the wedge shape allows for the installation of multiple pressure sensing holes, facilitating the use of multiple redundant sets for pressure measurement.
Yes, many interlock instruments on site are configured in this way: one control instrument, with the remaining three interlock instruments selecting 2 out of 3, all drawing from the same pressure tapping point.