Analysis of installation techniques for magnetic flap level gauges in tanks with high liquid levels

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The magnetic flap level gauge, also known as a magnetic level meter, magnetic column level gauge, or magnetic float level gauge, operates on the principle of magnetic coupling. It is one of the level measurement instruments used in numerous storage tank areas, and it has advantages over other types of instruments. In many cases, the magnetic flap level gauge is preferred due to its simple structure, easy-to-read readings, good operational stability, wide measurement range, and lack of limitation regarding the height of the storage tank. It is also easy to install – either from the side or from the top – and it overcomes the drawback of glass tube level gauges, which tend to break under high temperatures and pressures. This prevents disruptions to production as well as any harm to operators caused by broken measurement tubes, making it the preferred choice for level measurement in liquid storage areas. 　 Magnetic flap level gauges are available in top-mounted and side-mounted versions. In industrial applications, there are various types of storage tanks in use, including horizontal tanks, underground tanks, and tanks with large lengths. Since the top-mounted version lacks support structures, it is recommended that its height not exceed 5 meters. For the side-mounted type, the measurement range can be chosen arbitrarily; a tank with a length of 10 meters is generally no problem. The installation method should be chosen based on the specific requirements of the production site and the condition of the tank. The connection between the top-mounted magnetic flap level gauge and the tank usually employs flange connections of DN80 or DN100; if more stability is required, flanges of a larger size can be used depending on the actual circumstances. In most cases, DN80 and DN100 are sufficient. When the installation height of a top-mounted magnetic flap level gauge reaches 4 to 5 meters, it is recommended to add fixing cables on both sides; this helps to prevent the gauge from being damaged in harsh measurement conditions, such as those with significant vibrations or occasional impacts. 　 The liquid level height of magnetic flap level gauges and their technical impacts. For example, when measuring a liquid level in a tank that is 10 meters high, using a magnetic flap level gauge that is 10 meters long would be cumbersome and difficult to transport. Therefore, it is recommended to handle the measurement in segments, which will help avoid technical errors (such as those caused by blind spots). The advantage of the magnetic flap level gauge is that it can be installed separately. This not only facilitates transportation but also **reduces costs**. The user only needs to align the flanges after receiving the goods. As for corrosion prevention and leakage issues, we have also taken them into consideration; each specific problem is analyzed on its own. Magnetic flap level gauges can be equipped with electric remote transmission capabilities, delivering a standard 4–20mA signal to be used in conjunction with recording instruments or connected to industrial control computers. 　 10 meters and longer is a bit too long; whether it’s divided into sections or not, it’s advisable to use clamps or other fixing devices around the middle of the structure or at the flanges of each section. During installation, the magnetic flap level gauge must be kept in an upright position. A ball valve should be installed between the magnetic flap level gauge and the container’s inlet pipe, to facilitate maintenance and disassembly for cleaning of the gauge. The side-mounted lined magnetic flap level gauge (PP) is suitable for measuring inorganic corrosive liquids such as hydrochloric acid and dilute sulfuric acid. 　 The side-mounted lined magnetic flap level gauge (PTFE) is suitable for measuring liquid levels in environments with corrosive media and high operating temperatures. It utilizes advanced technology featuring a stainless steel lining with PTFE stretched flanges, ensuring reliable performance and a long service life. It is the best choice for measuring the level of highly corrosive fluids such as hydrofluoric acid. Before use, use the calibration magnet to set the balls below zero to red and the other balls to white.