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1. Basic knowledge of Magnetic flow meter
An mag flow meter is an instrument used to measure the flow of conductive liquids and slurries in closed pipes below 5 microsiemens
(Siemens: unit of conductivity). Its performance is not affected by properties such as corrosiveness, viscosity, pressure, density, acidity
and alkalinity of the medium. It can measure the flow of liquid, paste, slurry in water, wastewater, beverage, pharmaceutical, medical,
petrochemical, chemical, fertilizer, dairy, food, paper, mining and agriculture industries. It is also commonly used to measure steel plants
and power plants. of cooling water flow.
2. Installation guidelines
1. Electromagnetic flow meter must be installed in a location free of interfering components (valves, T-tubes, elbows, pumps, etc.).
To ensure there is no turbulent laminar flow upstream of the electromagnetic flowmeter. Therefore, the electromagnetic flowmeter
must be installed in a straight pipe at a distance of at least 3xDN from upstream interfering components and at least 2xDN from
downstream interfering components.
IMPORTANT: If there is a valve in the pipeline, the electromagnetic flowmeter should always be installed on the downstream side of
the valve
2. If reducing joints are required, the internal angle shall not exceed 7.5°. The minimum length to keep the angle below 7.5° can be
calculated by the following formula:
L = (D - d) x 7.63
Among them, "D" is the major diameter of the reducing joint, and "d" is the minor diameter of the reducing joint.
For example: If an electromagnetic flowmeter with a pipe diameter of DN80 is installed downstream of a 100mm pipe, the length of
the reducing joint must be at least 152.6mm to keep the internal angle below 7.5°.
3. The flange connection of the electromagnetic flowmeter must be assembled concentrically on the upstream and downstream sides;
if the connection is improper, it will cause liquid turbulence, thus affecting the measurement accuracy.
IMPORTANT: The washer and ground ring must also be installed concentrically.
4. The electromagnetic flowmeter must always maintain a full pipe state. Therefore, the electromagnetic flowmeter is strictly prohibited
from being installed at the highest point or free outlet in the pipeline system. Due to the influence of gravity, the pipe may be empty or
not full.
5. If the liquid being measured carries particles, such as when measuring sludge, sewage, etc., the electromagnetic flowmeter must be
installed vertically and keep the flow direction from bottom to top to ensure that the electromagnetic flowmeter is always full of pipes
and can effectively reduce the occurrence of bubbles. .
If you want to know more about electromagnetic flowmeters, please feel free to consult CIXIFM winny:
Email: sales01@cxflowmeter.com
hotline
(86)021-57632436