Problems with E+H mass flow meters
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What causes the E+H mass flow meter to suddenly show an increased value? For DN80 pipes, with the control valve opened at 1%, a water flow rate of 20 t/h is achieved. But after the control valve is closed, the flow rate becomes 0. Note: Neither the bypass valve nor the control valve has internal leakage. What is the cause of this phenomenon?
Is the control valve out of control? It’s not linear or equal to 100? Check the valve positioner and the actual travel of the valve to confirm.
Is there a large pressure difference before and after this valve? If the pressure difference is too large, it may cause vibration in the pipeline, and such a situation could occur
1. First, confirm whether the settings of the flow meter and its range are correct. 2. There is a high likelihood that the control valve is faulty; check whether there is internal leakage in the valve, whether the output from the positioner is incorrect, and whether the air supply pressure has an impact, etc. Consider these aspects to see if it can help you
After the control valve is closed, the flow meter shows zero. This indicates no internal leakage.
Check the valve position to rule out any abnormalities with the valve. Then check the flow meter.