PulseGuard Ltd. and Inc.
PulseGuard Ltd. offers pulsation dampers | Please phone 44(0) 161-480-9625
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Fluid Flow Control Animations
Fluid Flow Control Animations

CENTRIFUGAL PUMPS centrifugal symbol

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

See ShockGuard for problems involving Start up Surge & Shut Down Reflux Shock


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Multiplex pump with a complimenting WaveGuard - WaG

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Click on the picture or below for complimentary Dampers:
WAVEGUARD Wag No Moving Parts Damper
SURGEGUARD - Prevents the system from requiring the pump to generate a huge excess pressure to get the liquid column moving. To ShockGuard.com which specializes in Surge & Water Hammer

Need a Hand? Take this Step by Step Process to help you choose your perfect fitting damper Start Hereforward arrow

sketch centrifugal with dampers

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 = 7

centrifugal pump crossectional view
A centrifugal pump has 11 blades, at 725 RPM it Displacers 500 gpm,
500 gals x 231 in3 per Gallon / 11 blades x 725 rpm = 14.5 in3 displacement
@ 133 Hz.

Find your % residual fluctuation required figure
from the smoothness shown for each type of application.
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Selecting Pulsation Dampeners for Different Pump Systems.
Flow through pulsation dampers are at least 3 times more efficient than T off line accumulators.
Dampeners that do, flow goes through, but pressure pulsation does not.
PulseGuard Pulsation DampersThe Smooth Flow People

Call Toll Free 1-888-DAMPERS (326-7377) / See also: Pulsation-Dampeners.com for a pulsation dampener.

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