How to choose a metal tube float flow meter

Abstract: The information on how to choose a metal tube float flow meter is provided by the excellent flow meter and flow meter production and quotation manufacturers. How to choose a metal tube rotameter Product overview Metal tube rotameter is a variable area flow measuring instrument commonly used in industrial automation process control. It has the characteristics of small size, large detection range and convenient use. It can be used to measure liquids. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on how to choose metal tube float flowmeters. How to choose metal tube rotameter product overview Metal tube rotameter is a variable area flow measurement instrument commonly used in industrial automation process control. It has the characteristics of small size, large detection range and convenient use. It can be used to measure the flow of liquid, gas and steam, especially suitable for medium flow measurement with low flow rate and small flow. It has intelligent local display type and intelligent remote transmission type, with pointer display instantaneous/cumulative flow liquid crystal display, upper and lower limit alarm output, cumulative pulse output, batch control, standard two-wire 4~20mA current output, etc. form. Provides a very broad selection space for users to use. In addition, the instrument adopts advanced micro-processing central chip and high-quality industrial components. According to the different measuring tube structure, the metal tube float flowmeter of Xianxing Instrument Technology can choose different measuring tube forms according to different requirements of users, and it has further improvement in maintenance and cleaning. On this basis, with the intelligent metal tube rotameter indicator, the intelligent metal tube rotameter can be formed. Over the years, the various excellent performance and reliability of the metal tube float flowmeter, as well as a better performance-price ratio. Widely favored by petrochemical, steel, electric power, metallurgy, light industry, food, pharmaceutical, water treatment. Structure principle 1. Structure HLZ series metal tube float flowmeter is mainly composed of two parts: measuring tube HR-F indicator. The measuring tube includes conical tube or orifice plate, guide, stopper, float and other components, and the indicator includes components such as magnetic follow-up system, pointer, dial, circuit and so on. 2. Working principle The measured medium flows from bottom to top through the upper and lower ends of the float of the measuring tube to generate a differential pressure to form a lift force. When the lift force on the float is greater than the weight of the float immersed in the fluid, the float will rise, and the annular gap area will increase accordingly. The fluid velocity at the annular gap drops rapidly, the differential pressure at the upper and lower ends of the float decreases, and the rise acting on the float decreases with it until the lift force is balanced with the weight of the float immersed in the fluid, and the float stabilizes at a certain position. It corresponds to the flow rate of the measured medium in real time. The float has a built-in magnetic steel. When the float moves up and down with the medium, the magnetic field changes with the movement of the float. a. For the in-situ type, the rotation is caused by the coupling of the magnetic steel in the in-situ indicator and the magnetic steel in the float, and at the same time, the pointer is driven, and the flow rate at this time is indicated by the dial. b. For the intelligent type, the rotation occurs due to the coupling between the follow-up magnet in the intelligent indicator and the magnet in the float. At the same time, the sensing magnet and pointer are driven, and the magnetic field change is converted into an electrical signal through a magnetic sensor, which is displayed by A/D conversion, digital filtering, temperature compensation, microprocessor processing, D/A output, and LCD liquid crystal display. Instantaneous flow and cumulative flow. It is suitable for the measurement of small diameter and low flow rate gas, liquid and steam flow. 2. Magnetic coupling principle, no leakage and high pressure resistance. 3. High temperature resistance, up to 450℃. 4. Affected by a certain viscosity, it is not suitable to measure high-viscosity medium. 5. When the flow rate exceeds 100m3/h water flow, the pressure loss is large. 6. It is mostly used for process control instruments, the best accuracy is 1%, generally 1.5%, and the range ratio is 10:1. 7. There are all intrinsically safe explosion-proof and explosion-proof types, which are suitable for dangerous occasions. 8. There are various forms such as local pointer type, battery type, two-wire type, and 220V AC power supply type to choose from. 9. The most suitable installation method is vertical installation with bottom in and top out. 10. When measuring high temperature and low temperature (below -30 ℃) medium, it is best to use the jacket type. 11. It is not suitable for measuring medium with large density change. 12. Not suitable for measuring pulsating medium flow (such as metering pump outlet). 13. For gas, this watch has no temperature and pressure compensation, and needs to be considered separately. 14. For the intensive installation of multiple instruments or the carbon steel process pipeline passing near the instrument, keep a distance of more than 100mm from the instrument to avoid magnetic field interference. 15. For flow measurement of media containing a large number of ferromagnetic particles, a magnetic filter should be installed in front of the instrument and purged regularly. 16. The metal tube rotameter does not have high requirements for the straight pipe section, generally 250mm in the first 5D and the rear. 17. If the instrument is to be used in an explosion-proof occasion, the round-shell M4 indicator should be used. 18. The high and low alarm of the flowmeter is generally in the open collector OC gate mode, and an external relay is required to amplify the current. The relay output type can also be selected. The contact capacity is 1A@30VDC or 0.25A@250VAC or 0.5A@125VAC. The above is the whole content of this article,You are welcome to inquire about the flowmeter selection and quotation of our factory. 'How to choose a metal tube float flow meter'

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