The backpressure after the orifice plate flow meter increases
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Dear experts, I have a question: if the pressure in the line downstream of the orifice plate flow regulator suddenly increases due to water, will the reading on the flow meter decrease or increase? Thank you!
Regardless of the medium or the cause, an increase in pressure behind the orifice throttle (provided that the pressure before the throttle remains constant) will result in a decrease in the indicated flow rate. The measurement principle of a differential pressure flow meter is, in simple terms, based on the square root of the differential pressure value before and after the throttling element.
The orifice plate operates on the principle of differential pressure; when the backpressure increases, it is equivalent to an increase in negative pressure, resulting in a decrease in the indicated value
A orifice plate flow meter relies on differential pressure measurement; an increase in the pressure on the downstream side is equivalent to an increase in the pressure on the negative pressure side. If the pressure on the positive pressure side remains unchanged, the measured value will decrease
Obviously, the display value decreases because the pressure difference becomes smaller; the flow rate is linearly proportional to the square root of the pressure difference
It has gotten smaller. The pressure at the back has increased, the pressure difference has decreased, so the reading goes down