HOSE PUMPSMake 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
The Systems Response:
Find the "F" Valve of Your Pump - "F" is a correction Factor on the square of number of displacers.
Example, Centrifugals are intrinsically good - have a high F, Sandwich diaphragm metering pumps have a low F.
The F figure assumes that the size of the shoe or wheel is approx. one third of the volume between shoes or wheels.
A hose pump squeches out 150 liters of effluent sludge per minute, with 3 shoes revolving 15 times per minute.
150 liter / 3 shoes x 15 revs = 3.33 liters between shoes
@ 0.75 Hz.
Find your % residual fluctuation required figure
from the smoothness shown for each type of application. GO TO
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