Regarding the total flow rate when plunger pumps are connected in parallel
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This post was last edited by avatao on 2023-6-27 at 16:33. As the title suggests, I searched the forum for related questions, all of which dealt with the total flow rate when centrifugal pumps are connected in parallel. Chemical engineering principles do address this topic, but in my case I’m using 4 piston pumps connected in parallel. I checked the relevant principles again and found that no clear information is given regarding the total flow rate when piston pumps are connected in parallel; only one sentence is mentioned, as indicated by the red circle in the image below. Since I’m not sure, I’m here to ask for advice: For pumps of the same model, does the total flow rate when piston pumps are connected in parallel (where the total flow rate is less than the sum of the individual flow rates) behave in the same way as when centrifugal pumps are connected in parallel? 2. If they are the same, then the multiplier factor of the plunger pump must be different from that of the centrifugal pump. I am only in the initial stage of use, so precise calculations aren’t necessary. So, is there an empirical multiplier value that can give me the total flow rate when plunger pumps are connected in parallel? (2 units in parallel, 3 units in parallel, 4 units in parallel)
The issue of the total flow rate when piston pumps are connected in parallel differs from that when centrifugal pumps are connected in parallel. 1. For the total flow rate when centrifugal pumps are connected in parallel, it can generally be assumed that the total flow rate is equal to the sum of the individual flow rates of each pump. This is because the flow rate output of a centrifugal pump is determined by its operating speed; when multiple pumps are connected in parallel, each pump operates at the same speed, so the total flow rate equals the sum of the individual flow rates of each pump. 2. The total flow rate for piston pumps connected in parallel is slightly more complex. The flow output of a plunger pump is related to the pump’s displacement and operating frequency. When piston pumps are connected in parallel, the total flow rate is not necessarily equal to the sum of the individual pump flow rates, as the displacement and operating frequency of each pump may differ. The specific total flow rate needs to be calculated based on the discharge volume and operating frequency of each pump; it cannot be simply added together. Regarding your second question, there is no empirical multiplier value available for the total flow rate when piston pumps are connected in parallel; such a multiplier value is difficult to determine. Because the total flow rate of a piston pump needs to be calculated based on the displacement and operating frequency of each pump, and these parameters are determined according to actual conditions, there are no universal empirical multiplier values. Therefore, the total flow rate needs to be calculated based on the specific parameters and operating conditions of the pump. It is recommended that you refer to the operating manual of the plunger pump or consult relevant professionals to obtain the specific calculation methods and parameters. .