PulseGuard
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
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To Estimate the Max Volume (Size) of Flow Fluctuation Smoothing (single connection "appendage") or Pressure Pulsation Damper ("flow through interceptor")

SELECT PROPER PIPE FITTINGS forward arrow GO TO
= 100 x Volume of One Movement of One Displacer
No of displacers2 x F x The Percentage figure of allowable residual fluctuation
Abbreviation 100 . V
 N2 . F . % age fig. 

"F" is a correction Factor on the square of number of diplacers. Example, Centrifugals are intrinsically good - have a high F, Sandwich diaphragm metering pumps have a low F.

N: N Squared, N Exponent 2, means multiply the Number of displacers by that same number.
Example N2 : 1 Diaphragm head 1x1=1. 11 Blades 11x11=121, 2 Lobes 2x2=4, 3 Plungers 3X3=9
"%age figure" : 0.5% allowable residual fluctuation - use the figure 0.5 in the equation, for a residual fluctuation of say + & - 3%, 3 positive plus 3 negative = 6 - use 6 in the equation, +/- 5% total 10, use the figure 10.

R = Range Factor a multiplier applied to damper volume and is generated by the minimum pressure of which damping is to begin; to the max pressure of which damping to a specific smoothness level is to occur. A damper is to begin damping at 100 and to provide the specified smoothness even at 1000; will have a range factor of 1:10, and therefore be 10 times larger than a damper for the same system but only to work at 1000.

e = On the tabulations of dampers with no moving parts there is an 'e' column. This 'e' column is an equivalency of a hydronumetric moving parts damper; therefore, when a damper is selected by the above formula, AND YOU WISH A NON MOVING PARTS DAMPER TO PROVIDE VOLUMETRIC DAMPING AS WELL AS ITS NORMAL JOB OF PRESSURE WAY INTERCEPTION, YOU SELECT THE DAMPER WHICH HAS AN 'E' NUMBER OF THE CUBIC INCHES CALCULATED OF THE FORMULA.

EXAMPLE

  100 x 90 ml per stroke    = 3000 ml = 3 liters
 = approx. 0.8 US gals = 183 in3 damper
[From a triplex] 9 x [plunger factor] 1.5 x 0.5 [for 1/2% residual]

IT REALLY IS JUST THAT EASY TO OVERSIZE A DAMPER
BY IGNORING HOW MUCH PULSATION YOU WOULD HAVE WITHOUT ONE

EXPERTS ONLY
A diaphragm gas bag, bladder or sleeve, "a membrane", will move up to 15 times per second. 15Hz. When it is hidden from system fluctuations by being "Td" off the line. All the above applications require an in the line, flow through, multiconnection, and in and out port, damper. A flow through damper also intercepts pressure waves, which typically travel at 3500mph. For all those applications below a 15 Hz. frequency, flow through enable: Flush in place before system service. Constant temperature by first in first out. No sedimentation and intercepts the pressure disturbances with make meters and instruments inaccurate.
FOR THESE REASONS, INVENTORY - LOWEST COST DAMPERS - HAVE 2 CONNECTIONS.
For those who do not want the advantages of FLOW THROUGH, save buying a T for drain, RV, or gauge. Use the extra connection for that, and still buy the lease expensive - the flow through damper.


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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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