A diaphragm metering pump
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The outlet pressure gauge shows significant fluctuations, with a minimum value of 0 and a maximum value of several MPa. Upon inspection, no obvious defects were found in the inlet and outlet valve seats as well as the springs of this pump. Please, experts, give me some advice!
Check whether the safety valve has activated!
There is no buffer, or the buffer isn’t working; that’s it
Is the opening degree of the metering pump’s outlet valve very small? In such cases, the pipeline may seem partially blocked, which can result in extremely high outlet pressure. Another point is whether the diameter of the export pipelines is large enough, that is, whether the pipeline resistance is too high.
It’s possible that the inner bladder of the outlet accumulator has ruptured