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| Add Time： | 2016-08-22 14:58:41 |
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Product description:
Electromagnetic flowmeter for measuring volume flow of acid and alkali, salt and other corrosive liquid and slurry, pulp, chemical raw materials, water and other homogeneous two-phase fluid; suitable for chemical industry, iron and steel, coal, water, paper, food, medicine, textile printing and dyeing industry.
The ultrahigh pressure design is specially used in petroleum exploration, geology and so on.
CN311A type is an integral structure;
Type CN311B is divided into installation;
Selection of choice
· the inner wall of the measuring tube is smooth and unimpeded
· only the measured fluid conductivity is greater than 5 μ s/cm, in addition to organic solution and distilled water, the rest of the liquid and liquid-solid two-phase fluid can meet the measurement conditions
·, the measurement results are independent of the physical parameters such as pressure, temperature, density, viscosity and conductivity of the liquid, so it is not affected by the environment, so the measurement accuracy is high and the work is stable and reliable
· excellent corrosion resistance and wear resistance
· large range, especially suitable for occasions where the flow rate is large
FEP lined with metal lining can be used in · negative pressure pipeline
· with positive / negative bidirectional flow measurement function
The measurement accuracy of electromagnetic flowmeter is related with the measured flow, flow velocity, low velocity in the case of the electromagnetic flowmeter error is large, so in the choice of flowmeter caliber, caliber flowmeter selection process pipeline to improve the smaller than tube medium velocity measurement of electromagnetic flowmeter, will help to improve the accuracy of flow measurement.
Instantaneous volume flow is a function of flow rate and sensor aperture
The measuring range of a certain caliber electromagnetic flowmeter can be measured, and the specifications of several kinds of sensors suitable for measuring a given flow are given.
1, the sensor is usually the same as the diameter of the process pipe, so easy to install, but the premise is that the flow rate should be between 0.1m/s ~ 12m/s.
2, when the flow rate is low, the process flow is stable or from the price, can choose the diameter of the sensor is less than the diameter of the process pipeline.
3, the installation of different diameter pipe will produce pressure loss, should choose the diameter of the central cone angle α not more than 150, the smaller the better.
Selection of earthing ring
If the use of PTFE lining, it is appropriate to choose the grounding ring as a protective ring (DN250 below the flowmeter, the instrument itself with).
If the instrument is connected to the pipe (with respect to the measured medium) is insulated, it is necessary to select the grounding ring.
Selection of grounding ring material should be consistent with the corrosion of the measured medium.
Installation suggestion
· the measuring tube at any time must be completely filled with medium
· length of pipe section:
Inlet straight pipe section of at least 5 × DN long
Outlet straight pipe section of at least 3 × DN long
· can not be installed in the pipeline to the highest point and the downward movement of the fluid section
· can be installed horizontally or vertically upwards
· install control valve and shutoff valve upstream of the sensor
· sensor cannot be installed on pump suction side
