What kind of environment and measured medium is the metal tube rotameter suitable for?

Abstract: Which kind of environment is suitable for the metal tube float flow meter and the use information of the measured medium is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. Float (rotor) flowmeter, also known as rotameter, is mainly used for small and medium-caliber flow measurement, and can measure liquid, gas, steam, etc. The product series has a complete range of specifications and is widely used in all walks of life. Rotary flowmeter classification Classification according to the material of the tapered tube. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details of which environment and the measured medium are suitable for the metal tube float flowmeter. Float (rotor) flowmeter, also known as rotameter, is mainly used for small and medium-caliber flow measurement, and can measure liquid, gas, steam, etc. The product series has a complete range of specifications and is widely used in all walks of life. The classification of rotameter can be divided into transparent material cone tube and metal cone tube according to the classification of cone tube material. 1. Transparent conical tube rotameter materials include glass tube, transparent engineering plastics such as polystyrene, polycarbonate, plexiglass, etc. Among them, the glass tube is the most used, but it is easy to break; while the engineering plastic tube is not easy to break, and some are also resistant to corrosion by corrosive media such as acid and alkali. The diameter of the transparent conical tube rotameter is 15~40mm, and the flow indexing is directly engraved on the outer wall of the conical tube, or an indexing scale is installed next to the conical tube. There are cone smooth surfaces and guide ribs (or flat surfaces) in the conical tube. ) two kinds. The float moves freely in the conical tube, or moves under the guidance of the ribs of the conical tube, and the instrument with the inner wall of the larger mouth and smooth surface is also guided by the guide rod. Metal tube rotameter The diameter of the metal tube conical tube rotameter is 15~100mm, and the displacement of the float is transmitted to the conversion part outside the casing by means of magnetic steel coupling. Compared with the transparent conical tube rotameter. Can be used for higher media temperature and pressure, and is not easy to break. There are several other structures of the transparent rotameter. For example, the transparent straight tube rotameter is a deformation structure of the transparent conical tube rotameter. The flow detection element is composed of an orifice plate and a conical floating plug. There are other types or variants of metal tube conical tube rotameters. Among them, the direct instruction type can directly observe and read the position of the float through the transparent straight pipe and the floating plug; the horizontal installation type can be installed in the horizontal pipe; the straight-through type is different from the right-angle flow direction of the typical structure, and the flow direction does not need to be changed. Convenient; the floating plug orifice plate replaces the rotor cone tube with the floating plug orifice plate, and it is more convenient to change the flow specification as long as the floating plugs with different tapers are exchanged. B.2 According to the function of flowmeter, it can be divided into on-site indication, pneumatic remote signal output, electric remote signal output, alarm, etc. Transparent tube rotameters are all on-site indicating types. Sometimes a proximity switch is installed to output upper and lower limit alarm signals. The conversion part of the remote signal output type instrument converts the displacement of the float into a current or air pressure analog signal output, which is respectively a gas remote rotameter and an electric remote rotameter. B.3 According to the connection method with the pipeline, it can be divided into hose connection, flange connection and threaded connection. There are three connection methods for transparent tube rotameter. Among them, hose connection is often used for instruments with a diameter of 10mm or less and places with low working pressure; threaded connection is often used for instruments with a diameter of less than 40mm, which is not widely used; flange connection is used for Instruments with a diameter of 15~100mm are the most common applications. The metal tube rotameter is usually flanged, and individual models are threaded. B.4 According to the classification of the fluid to be tested, it can be divided into liquid, gas and steam. Most rotameters can measure both liquid and gas with the same instrument. Only specially designed metal tube rotameters can be used to measure steam, or additional components can be added to standard instruments, such as adding liquid damping parts with heat sinks, adding heat sinks to the connection with the indicating conversion part, etc. B.5 According to the classification of use, it can be divided into basic type, jacket insulation type, explosion-proof type, corrosion-resistant type and blowing type. The base type is the most widely used. The jacket insulation type is used for occasions where the temperature in the pipeline is significantly higher (or lower) than the ambient temperature. When there is explosive gas or dust, the electric remote rotameter adopts explosion-proof type. At present, there are explosion-proof design structure and intrinsically safe explosion-proof design structure in China. The structural parts and floats of the corrosion-resistant rotameter in contact with the medium are made of engineering plastics such as polytetrafluoroethylene. The flow rate of the blowing type is small, the air is 20~3000L/h, and the water is 0.3~100L/h, and the accuracy is not high. The blowing type rotameter is integrated with a small self-operated differential pressure regulator, so that the flow change caused by the pressure fluctuation of the power source or the disturbance of the downstream parameter change can be adjusted by itself to maintain a constant flow. B.6 It can be divided into full-flow type and split-flow type according to the way of passage of the tested fluid. The full flow type refers to the instrument in which all the fluid to be measured flows through the rotameter. The shunt type means that only part of the measured fluid flows through the flow detection part such as the float.The split-flow rotameter is composed of a standard orifice plate mounted on the main pipeline and a small-diameter rotameter. It is used for larger flow with a pipe diameter greater than 50mm and places where local indication is required. Notes on installation of metal tube rotameter: (1) Install it vertically on a vibration-free pipeline, and the fluid flows through the meter from bottom to top. (2) A filter should be installed upstream of the instrument when measuring dirty fluid. (3) If the fluid itself pulsates, a buffer tank can be installed; if the instrument itself oscillates, a damping device can be installed. (4) To exhaust the gas in the liquid meter. (5) When the fluid density, gas pressure and temperature of the conditions of use are inconsistent with the calibration, necessary conversions must be made. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'What kind of environment and the measured medium is suitable for the metal tube rotameter meter'

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