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.
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.
F = 0.6
Triplex Quad and Quin versions of this type of pump, particularly when used at pressures above 100bar (1500psi), have a phenomenal tendency to create huge pressure disturbances, and high frequencies from interaction within the manifold. The F factor of 0.5 is stated to cause additional damper size to allow for the greater level of pulsation that might not be expected. Special OCTOPUSSY replacements for the pump manufacturers interconnection manifold are available.
Find your % residual fluctuation required figure
from the smoothness shown for each type of application. GO TO