A centrifugal pump designed for diesel is being used to pump gasoline
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For a centrifugal pump designed for diesel to pump gasoline, does the actual head increase or decrease? Will the transfer height for gasoline with a low medium density be greater or smaller?
The head should have increased a bit. Gasoline with a low medium density requires a higher transfer height, but the difference isn’t necessarily very large
The head remains constant; what changes are the pump outlet pressure and shaft power. At the same volume flow rate, both the outlet pressure and shaft power decrease.
The design density is lower than the actual density. Based on calculations related to gravity and the performance curves of pumps, it can be seen that the actual head height decreases due to the reduced density； If the medium density is low, the conveying height will also decrease.