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Calculating BASE FREQUENCY in Hertz.

1. In order to find the right damper you 1st need to find your base Frequency in Hz.

Calculate - rpm / 60 x Number of displacers = Base Frequency in Hz. "Hertz"

Right your answer down.

2. GO ON to calculate your Fluctuation GO TO

 

NUMBER OF DISPLACERS:

1 = simplex	(Single piston or plunger - may also be pushing oil to move a diaphragm)
2 = duplex	(Two plungers etc. - the flow will still come to a halt as one changes over to another)
4 = triplex	(Three, now there will be continuous flow, provided the volumetric efficiency is high enough)
6.5 = quadraplex	(Four, sounds better. But the problem is that such a low & even number maximizes the chances of resonance, so flow through interception becomes a necessity)
9 = quintuplex	(5, Good - overlap even at low volumetric efficiencies)
18 = septuplex	(7, Also good, BUT now the number of pulses per second is becoming high. High frequencies may easily match the high frequency of short pipe nodes. If this occurs what ever level of residual forcing pulsation you go down to, the system stands a good chance of amplifying the residual pulsation to a high level.

 

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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.
The Smooth Flow People

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