Electromagnetic flow meter application fields and the installation requirements

Electromagnetic flowmeter installation first pay attention to the sensor itself cannot serve as support point load, it can't support the next work, pipe should be holding its pipeline bearing. * in order to obtain the normal measurement, electromagnetic flow sensor straight pipe upstream also should have a certain length, but its length compared with most other flowmeters demand is low. Elbow, tee pipe, concentric reducer, fully open gate to from the sensor after 5 times the diameter of the inlet flange junction surface ( 5 d) The length of the straight pipe, the different opening of valve requires the 10 d; Downstream straight pipe for ( 2 ~ 3) D； But to prevent the butterfly valve plates to the sensor tube. The standard or verification procedures proposed upstream and downstream straight pipe length is not consistent, some demands more than the usual high electromagnetic flowmeter. This is because to ensure the current 0. The requirement of precision instrument level 5. Sensors installed direction of horizontal, vertical or inclined ( Must be horizontal or inclined upward direction of fluid flow) May be, is not restricted. But to ensure the measuring tube and process piping coaxial. The axis deviation shall not be more than 2 mm. Measure the solid-liquid two-phase fluid * vertical installation, good flow from bottom to top. When mounted horizontally lining that can avoid lower partial wear serious, shortcomings and so on low velocity when the solid phase precipitation. In sensor adjacent pipelines for welding or flame cutting, to take quarantine measures, to prevent the lining is heated, and must confirm instrument transducer signal line not connected, prevent damage when mounted horizontally to make converter electrode axis parallel to the horizon, not in the perpendicular to the horizon, because in the department of electricity is easily covered by sediment, the top electric vulnerable to accidentally put air bubbles in the liquid grazed the electrode surface, make the output signal wave. Electromagnetic flowmeter is widely used in petroleum, chemical, metallurgical, textile, food, pharmaceutical, paper making industries and environmental protection, municipal administration, water conservancy construction and other fields. Sensor is the main component of: measuring tube, electrode, excitation coil, magnetic yoke iron core and shell. Products are mainly used to measure volume flow of conducting liquid and slurry in the closed pipeline, including acid, alkali, salt and other corrosive liquids.

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