Analysis steps for the failure of the hottest flow

2022-10-22
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Analysis steps of flow control instrument system fault

1) when the indicated value of flow control instrument system reaches the minimum, first check the on-site detection instrument. If it is normal, the fault is in the display instrument. When the indication of the on-site detection instrument is also minimal, check the opening of the regulating valve. If the opening of the regulating valve is zero, it is often a fault between the regulating valve and the regulator. When the indication of the on-site detection instrument is minimum and the opening of the regulating valve is normal, the fault reason is likely to be caused by insufficient system pressure, blocked system pipeline, insufficient pump capacity, medium crystallization, improper operation and so on. The elastic modulus of the material is not less than 200gp. If it is an instrument failure, the reasons are: the orifice differential pressure flowmeter may be a positive pressure impulse conduit plug; The positive pressure measurement value of differential pressure transmitter and mark 1 cause room leakage; Mechanical flowmeter is gear stuck or filter blocked, etc

(2) when the indication value of the flow control instrument system reaches the maximum, the detection instrument often indicates the maximum. At this time, the manual remote control regulating valve can be opened or closed. If the flow can be reduced, it is generally caused by process operation. If the flow value cannot be reduced, 7.1 inspection classification is caused by the instrument system. Check whether the regulating valve of the flow control instrument system acts; Check whether the instrument measurement pressure system is normal; Check whether the instrument signal transmission system is normal

(3) the indicated value of the flow control instrument system fluctuates frequently, so the control can be changed to manual. If the fluctuation decreases, it is due to the instrument or the improper PID of the instrument control parameter. If the fluctuation is still frequent, it is due to the process operation

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