The flow rate of the Rivac metering pump is not stable, with fluctuations
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The outlet pressure has remained stable, but the outlet flow rate (as indicated by the on-site electronic flow meter) is unstable with large fluctuations; the on-site metering pump is equipped with a damper. I would like to ask the experts what causes this? Is the one-way valve at the entrance/exit broken? Is the inlet filter clogged again? Is it still a problem with the instrument?
Check the flow meter. The outlet pressure of the pump is stable (excluding the possibility of a faulty pressure gauge), which indicates that there is no problem with the pump’s check valve. Check whether the entire system is stable.
This post was last edited by Darija on 2020-11-20 07:28; it’s usually due to the instrument. Check whether the specific system is reasonable.
Well, thanks for sharing. Just as you thought
Try to reduce the flow rate by adjusting it in conjunction with frequency variation.
Okay, thank you for sharing your valuable experience
Adjust the stroke to see if there is any change in flow rate. If so, blockages at the inlet of the flow meter can cause fluctuations in flow rate; also check whether the pressure difference across the filter at the material inlet is high – if it is, the filter needs to be replaced. LEWA has minimum requirements regarding the pressure at the pump inlet, so verify that these requirements are met