The flowmeter is one of the few instruments that are more difficult to use than to manufacture. Sewage flowmeter should consider the influence of pipeline, caliber size, physical properties of the medium (corrosiveness, dirty degree, abrasiveness), fluid dynamics, working pressure, medium temperature, etc. when selecting the model. According to the characteristics of sewage, the commonly used sewage flow meters are roughly as follows:1. Electromagnetic FlowmeterThe electromagnetic flowmeter does not accept the influence of external factors such as temperature, pressure, viscosity, density, etc., and there is no pressure loss in the internal contraction or protruding part of the measuring tube. The initial signal detected by the flow element is a voltage that changes accurately and linearly with the average flow rate of the fluid. It has nothing to do with other properties of the fluid and has great advantages. According to the characteristics of large changes in sewage flow, many impurities, and certain conductivity, it is a good choice to measure sewage with electromagnetic flowmeters.The electromagnetic flowmeter is suitable for the pipe diameter of DN15-DN3000, and the range ratio can reach 1:150. It only needs the first 5D and the 3D main section. It is simple to install, easy to use, high in measurement accuracy, compact in structure, and small in size. Installation, operation and maintenance are very convenient, and it can work normally in harsh environments. PTFE lining can be used to measure sewage, and 316L stainless steel electrodes can meet the measurement requirements.2. Vortex FlowmeterVortex flowmeter is cheap, simple and convenient to install, small pressure loss, wide range ratio, high measurement accuracy. When measuring sewage, pay attention to the corrosiveness of the sewage. If it is more corrosive, it can be lined with polytetrafluoroethylene. No edema can not be contained. Flocs, such as plastic cloth, hanging on the vortex generator will affect the frequency of the vortex street, thus affecting the measurement of the instrument.
Post time: 21-09-21