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

Low Pressure Medium Frequency Lobe Pump Pipes
Can need pulsation dampening.
When running on liquids containing particulate, a low to medium frequency pressure disturbance occurs.

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

Even these, THE SMOOTHEST of all POSITIVE DISPLACEMENT PUMPS have pressure disturbances, which are normally not important, but when they are connected to piping systems that were not designed, will cause pulsation

The source of the disturbance, that is magnified into pulsation by poor, or no pipe design is, from "X"

Pulsation dampers with no moving parts, and no foam to degrade or clog
The answer to, low pressure & low volumetric pulsation with particulate systems.
The WAVEGUARD, Volume Sphere
The volume of slightly compressible liquid kill the pulsation.


Go Here to Calculate your VOLUMETRIC & FREQUENCY NEEDS GO HEREforward arrow
Application Story Multiplex pump with WaveGuard - WaG GO HEREforward arrow

Click on the picture or below for complimentary Dampers:
WAVEGUARD WaG H.O. No Moving Parts Damper

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

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 = 1.0

vane pump cross sectional view
A tri-lobe pump at 173 rmp, discharges 3 tons per hour
100 lbs per minute x 25 in3 per pound / 3 lobes per rev x 173 rpm = 4.8 in3 per lobe
@ 8.7 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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