Metering pump flow control
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May I ask if there are any other methods for flow control besides using variable frequency control? Also, if there are other ways to control flow, how can we ensure the reliability of such flow control? Thank you.
First, select a suitable pump; the flow rate can be adjusted by the opening degree of the outlet valve, and it is relatively reliable to keep it within the pump’s performance curve range.
A metering pump is a positive-displacement pump that measures and controls flow rate at the same time; it’s not ideal to have a valve at the outlet… A piston pump can be adjusted using a handwheel
The flow rate is adjusted by changing the stroke length of the metering pump; however, it is first necessary to create a curve showing the relationship between flow rate and stroke length. This relationship is linear, and by using this curve, the flow rate can be adjusted by changing the stroke length. The stroke length should not be too low, with values typically ranging from 20% to 100%.
Oh, it’s a metering pump; metering pumps generally have a low flow rate and are used as dosing pumps. Moreover, the traffic is very precise; I don’t understand why the original poster needs to make adjustments.
There is a knob on the pump to adjust the flow rate
This post was last edited by ylb913 on 2015-12-16 05:35. I have done this before. Adjust the pump’s volume knob: forward or reverse? I first enlarge a certain scale of the self-recalibration, just like overcoming the false locking of the valve. This often requires several shifts to determine a single point, and then many attempts are needed to accurately adjust different injection amounts. Ultimately, a correspondence table needs to be created for the team to follow. I make corrections by monitoring the change in the liquid level (volume) of its inlet tank.
The metering pump can be adjusted by varying the motor frequency or adjusting the stroke~~Adjustment via the outlet valve is prohibited~~
An electric diaphragm pump is used to obtain accurate values through data analysis; however, re-analysis is required when the outlet pressure changes
Metering pumps can generally adjust the flow rate, or accessories can be purchased for such adjustment
You mentioned that for centrifugal pumps, it is possible to use variable frequency drives or magnetic couplings, as well as fluid couplings. As for metering pumps, they can be adjusted directly; the valves on the inlet and outlet pipelines of such pumps should all be fully open. Under no circumstances should the outlet valve be used to control the flow rate