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
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PIPEGUARD LP & HP High & Low Pressure Elastomer Membrane Damper
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The Systems Response:
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 = 1.3
Fluid driven differential area pressure intensifiers generally have two features which result in lower levels of discharge pulsation than might otherwise be expected.
A). The ratio of stroke length to diameter is wide. This results in minimal dead volume. B). The return stroke is normally faster than the discharge stroke, so the volume necessary to sustain flow in less than would be required for an equal discharge and return stroke machine. Hydraulically driven versions are highly energy efficient also.
That is why the F factor in better, causing a smaller damper selection
Find your % residual fluctuation required figure
from the smoothness shown for each type of application. GO TO
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