Magnetic flow meter
Straight pipe： upstream≥5D, downstream≥3D. Insertion type entrance ≥10D, exit ≥5D
Valve: Flowmeter installed behind the valve, flow meter upstream ≥10, Downstream≥5D
Front of right-angle turn： Upstream ≥10, Downstream≥5D
Behind of right-angle turn： Upstream ≥10, Downstream≥5D
Horizontal installation： The inner diameter of the pipe should be the same as the inner diameter of the sensor.
Vertical installation： The flow direction of the fluid is from bottom to top, and the sensor cannot be installed at the highest position of the pipeline to prevent the accumulation of bubbles.
https://zeroinstrument.com/magnetic-flow-meter-straight-length-requirements/