I have a application which requires the upstream tap of a delta pressure transmitter to be purged with water to help eliminate impulse line plugging. The request is to purge the impulse line with about 1 gpm of process water. The question is "How would this best be accomplished and how will it affect the transmitter calibration?" The taps for the transmitter are across a 16" butterfly valve. I currently have Nitrogen purges on both taps but only the high side tap plugs at this time. Soliciting all inputs as to how to make this work.
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