If a wedge flow meter is installed vertically, how can a double-flange connection be transferred?
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The wedge flow meter is installed vertically; when the double flanges are not tightened, the zero point is -6 Kpa. The medium being measured is water, and the range is 0-8 Kpa. So, is it LRV=-6 and URV=2, or does the weight of the water medium need to be taken into account? In that case, LRV=-0.6+0.6=0 and URV=8. Which value is correct? Thank you
The weight of the water needs to be taken into account. When the flow rate is 0, the pipe is filled with water at rest.
If the flow is at rest, simply zeroing it out will result in migration; if it’s not at rest, closing the valve and loosening the flange screws allows for direct zeroing against atmospheric pressure. This saves the hassle of having to do calculations
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