How is the flow rate of parallel metering pumps calculated?
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I’m a newcomer and have a question for the experts. I see that the flow characteristic curve of the metering pump is a straight line; then, when two metering pumps are connected in parallel, is the flow rate twice that of a single pump? For example, I am using a single metering pump with a stroke of 10 and a flow rate of 10 KG. If 2 units are connected in parallel with a stroke of 5 each, will the flow rate also be 10 KG? ? Is this calculation correct? ? Also, the ratio I calculated based on the pump’s curve does not match the ratio used in practice on site; could this be due to wear and tear on the pump itself, indicating potential problems? ? ? I hope the experts here can give some advice; I would be extremely grateful!
The stroke of a metering pump is proportional to its flow rate; under the same stroke conditions, the flow rate in parallel operation is twice that of a single pump
It certainly isn’t a two-fold relationship; you need to take the characteristics of the pipeline into account when doing the calculations
It’s basically twice as much, right? After all, it’s a positive displacement pump
The sum of the flow rates of the two pumps is the total flow rate
It should be the total of the traffic for each device
The unit is equipped with two hydraulic diaphragm pumps, one in operation and one as a backup. Since the flow rate provided by a single pump does not meet the process requirements, using both pumps in parallel can result in damage to one of the diaphragms. What’s the reason?
When inhaling, they struggle against each other; when exhaling, they fight one another
The adjustment travel for a single unit stops at 42% current overload; when two units are connected in parallel, each operating at 20% and 21% can meet the process requirements. Check that manual adjustment allows for smooth cranking over 80% of the stroke, and that the inlet and outlet check valves of the pump head are airtight with no leaks. Is it related to blockages in the process pipelines?