LDE-25 electromagnetic flowmeter for chilled water measurement advantages

Case introduction

LDE-25 electromagnetic flowmeter in the current industrial production in a very wide range of uses, can be applied to a variety of conductive liquid measurement, especially in the water-based fluids and a variety of acidic and alkaline fluids with a very * performance, today we will briefly talk about the advantages of electromagnetic flowmeter in the measurement of frozen water and in the selection and installation of some of the issues that need to be noted. In the flow measurement of frozen water, electromagnetic flowmeter has quite obvious advantages in the measurement of frozen water flow can also be revealed, which corrosion resistance, for salt water frozen water is particularly important. 1. Measuring pipe lining selection if the frozen water is fresh water, the choice of rubber lining, the price is lower. If the chilled water is salt water, it is necessary to choose PTFE lining. If both the measurement of fresh water chilled water and salt water, it must be selected PTFE lining. 2. LDE-25 electromagnetic flowmeter lining to withstand negative pressure problems of chilled water flow during normal measurement, the measurement pipe itself does not withstand negative pressure, only in the pipeline will be discharged in the storage of water, due to the pipeline characteristics of the venting valve to forget to open, only to make the pipeline on the top of the negative pressure. 3. Electromagnetic flowmeter measuring pipe excitation coil moisture problems electromagnetic Flow sensor in the excitation coil sealed in the shell method commonly used in two ways, one is to use the upper and lower halves of the shell, with screws to seal the sealing strip after pressing, to achieve sealing; another is to use the shell welding sealing method, the coil and the outside world. Which after reliable, can * Du coil cavity breathing phenomenon, to prevent the outside world moisture intrusion. However, in the production process, the cavity around the coil is always full of air, and the water vapour content therein varies with the changes in atmospheric temperature and relative humidity at the time of assembly. Then the flowmeter is put into use due to the lower temperature in the conduit and cavity, it is likely that condensation will occur, resulting in the coil moisture, the edge is destroyed. Consequently, when the temperature of the chilled water is low (some manufacturers are bounded by 0 ℃ ‘>), the air in the cavity with nitrogen to replace the air, and in the temperature is high and low (such as -10 ℃ or high and low), with methyl silicone oil (some manufacturers use transformer oil) filling.