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Make a note of this pump's F number, also known as its Flow Fluctuation Figure. Use the F number with the % residual fluctuation required figure from the smoothness shown for each type of application. These two figures, the F figure and the % figure, applied to the size selection formula give you the smallest practicable damper size.
See below for figures
Need a Hand? Take this Step by Step Process to help you choose your perfect fitting damper Start Here
Find the "F" Valve of Your Pump - "F" is a correction Factor on the square of number of diplacers.
Example, Centrifugals are intrinsically good - have a high F, Sandwich diaphragm metering pumps have a low F.
F = 0.4
A quintuplex plunger pump turned at 880 rpm, generates 60+ M3 per 8 Hr shift
2000 gals per hour x 3,800 ml per gallon / 60 minutes per Hr. x 5 piston per rev x 880 rpm = 28.8 ml/stroke
Find your % residual fluctuation required figure
from the smoothness shown for each type of application. GO TO
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