Yokogawa AXR electromagnetic flowmeters are easy-to-operate, powerful, and extremely durable flowmeter products developed based on decades of field applications, while replaceable electrodes,The "Dual Frequency Excitation Method" noise cancellation solution enables Yokogawa flowmeter products to achieve both stability and high speed in extremely harsh environments.
The selection of Yokogawa electromagnetic flowmeters is mainly closely related to the following parameters:
1; Select the Yokogawa electromagnetic flowmeter type: integral type and separate type
The integrated type and the separate type have their own advantages. The basic principles of selection are as follows: the separate type is generally used in the field without reading data, and the field working environment is not good, such as explosion-proof occasions.
Or frequent or long-term immersion in water and other occasions with special requirements.
2; Selection of caliber and range
The Yokogawa electromagnetic flowmeter should try to choose the same diameter as the pipeline. If the diameter of the pipeline has not been determined, please give the flow range and flow rate for the engineer
Refer to the selection of the appropriate diameter: under normal circumstances, the flow rate should be ≤3m/s. For the fluid that is viscous and easy to adhere to the pipe wall, it is more appropriate to select the flow rate ≥2m/s.
After the flow rate is determined, the pipe diameter D can be calculated according to the flow rate = flow rate xπ/4xD2.
There are two requirements for the range selection of Yokogawa electromagnetic flowmeter:
1. The measured flow rate must be less than the range of the Yokogawa electromagnetic flowmeter. 2. The actual flow rate is 30%~80% of the range of the Yokogawa electromagnetic flowmeter is the best.
3; Selection of temperature and pressure
The medium pressure and temperature that can be measured by Yokogawa electromagnetic flowmeters have a certain range. For example, under the diameter of 2.5-50mm, the maximum working pressure is 4MPa; under the diameter of 65-200mm,
The maximum working pressure is 2MPa; the diameter of 250-400mm, the working pressure is 1MPa.
4; Selection of lining material and electrode material
The lining material and electrode material of Yokogawa electromagnetic flowmeter must be correctly selected according to the physical and chemical properties of the medium, otherwise the meter will be corroded by the lining and electrode.
However, it is quickly damaged, and the highly corrosive medium can easily cause accidents if it leaks. Therefore, it is necessary to confirm the liquid, conductivity, and fluidity strength of the medium on site.
and friction, with or without corrosion. If the medium is water and the temperature is not high, the lining of any material of the electromagnetic flowmeter can be satisfied.
If it is a corrosive medium, it is best to use PFA Teflon lining, because this lining is the best choice for corrosion resistance in the industry. If it is a friction medium,
Then choose natural soft rubber and rubber lining, because this lining has better toughness. The flow rate is not good, it is best to use the lining to do mirror polishing to increase the flow rate.
5; The connection method of the sensor
Yokogawa electromagnetic flowmeters from small to large diameters have thread, butt welding, clamping, flange, clamp and other connection methods. In terms of cost saving, clamp connections can be selected within DN300.
Moreover, the corresponding pressure level and stability can also be achieved, but the installation test of large diameter needs to pour a cement column under the flowmeter to ensure stability.
Of course, flange connection can be selected from DN2.5mm to 2600mm. Available for everyone to choose from. In terms of production process, if it is the food industry and the pharmaceutical industry,
It is best to choose the clamp connection method. Because the clamp connection is externally sealed, it will not cause secondary pollution to the liquid. Installation and disassembly are also convenient.
4. Selection of power supply mode and on-site display header
The choice of power supply mode is best to match the on-site occasion. Yokogawa electromagnetic flowmeters are available in DC24V and AC220V for users to choose from.
If the AC220V power supply mode is selected, and only DC24V is allowed on site, the remedy is to purchase an AC220V to DC24V power supply.
For the selection of the on-site display header, if the installation is in a high position, and you do not read it once a year and a half, it is not necessary to choose an LCD liquid crystal header. This can also save costs.
