Series and parallel connection of steam jet pumps
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What is the difference between series and parallel connection of steam jet pumps? What are the differences in terms of operation? Is there a difference in the level of ability?
If steam ejector pumps are connected in series, the pressure at the outlet of the last pump is equivalent to twice that of a single pump, though it may be slightly less; the flow rate remains essentially unchanged； If connected in parallel, the flow rate will be slightly less than double, while the head remains essentially unchanged.
Steam ejector pumps are connected in series to increase the vacuum level of the system； When connected in parallel, the vacuum level of the system remains unchanged, while the flow rate of the gas being extracted increases.
Used in series, steam jet pumps used in series can achieve a lower vacuum level.
For series connection of steam jet pumps, the outlet pressure depends on the conditions of the last pump. It will generally increase. When connected in parallel, the pressure remains unchanged, while the flow rate is the sum of the individual flow rates. In operation, care should be taken to start or stop the pumps simultaneously.