helium omni directional antenna.Classification of Metal Tube Float Flowmeters

　　Classified by cone material: it can be divided into transparent material cone and metal cone. Transparent conical tube metal tube float flowmeter: Transparent conical tube materials include glass tubes, transparent engineering plastics such as polystyrene, polycarbonate, organic glass, etc. Metal conical tube float flowmeter: The diameter of the metal conical tube float flowmeter is 15-40mm, and the displacement of the float is transmitted to the conversion part outside the casing through magnetic steel coupling and other methods. Compared to transparent conical tube float flow meters. Can be used for higher medium temperatures and pressures, and is not easily broken. In addition, there are several other structures for transparent float flow meters. For example, the transparent straight tube float flow meter is a deformation structure of the transparent conical tube float flow meter, and the flow detection element is composed of an orifice plate and a conical float plug. There are other types or deformed structures of metal tube conical tube float flow meters. The direct instruction type directly observes and reads the position of the float through a transparent straight tube and a float plug; Horizontal installation type can be installed in horizontal pipelines; The right angle flow direction of the through type is different from that of a typical structure, and there is no need to change the flow direction. It can be directly connected to vertical pipes, making installation convenient; The floating plug orifice plate type replaces the rotor conical tube with a floating plug orifice plate. Changing the flow specification only requires replacing the floating plugs with different taper angles, which is more convenient. Classified by flowmeter function: it can be divided into on-site indication, pneumatic remote transmission signal output, electric remote transmission signal output, alarm, etc. Transparent tube float flow meters are all on-site indicator types. Sometimes equipped with proximity switches, output upper and lower limit alarm signals. The conversion part of the remote signal output type instrument converts the displacement of the float into an analog signal output of current or pressure, which is respectively called a pneumatic remote float flowmeter and an electric remote float flowmeter. Classified by pipeline connection method: it can be divided into hose connection, flange connection, and threaded connection. There are three connection methods for transparent tube float flow meters, among which hose connection is commonly used for instruments with a diameter of less than 10mm and places with lower working pressure; Screw connections are commonly used for instruments with a diameter of 40mm or less, and their application range is not wide; The flange connection is used for instruments with a diameter of 15-100mm, and is commonly used. Metal tube float flow meters are usually connected by flanges, and some models use threaded connections. According to the classification of the measured fluid, it can be divided into liquid, gas, and steam. Most float flowmeters can measure both liquids and gases using the same instrument. Steam measurement can only be carried out using specially designed metal tube float flow meters, or additional components can be added to standard instruments, such as adding liquid damping components with heat dissipation fins or adding heat dissipation fins at the connection with the indication conversion section.

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