Model of midline butterfly valve The midline butterfly valve is actually a butterfly valve The structural form of the midline butterfly valve is a sealed central vertical plate, the whole butterfly plate and the valve seat are concentric within 360 ° circumference (midline), with two-way sealing function, so let's summarize the model of the midline butterfly valve

The premise of using electromagnetic flowmeter is that the measured liquid must be conductive and not lower than the threshold value (i.e. the lower limit value). If the conductivity is lower than the threshold value, the measurement error will occur until it cannot be used. If the conductivity exceeds the threshold value, it can be measured even if it changes. The indication error changes little. The threshold value of the universal electromagnetic flowmeter is between 10-4 and (5 × 10-6) S/cm, depending on the model. The use also depends on the length of the flow signal line between the sensor and the converter and its distributed capacitance. The manufacturer's operating instructions usually specify the length of the signal line corresponding to the conductivity.