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

PRESSURE PULSATION DAMPING
On Typical Diaphragm Metering Pumps

Simply, how it works:

1. Pressure measured at one place in a piping system can be seen approx. 1400 meters away, (o.87 miles away) one second later. That is to say the speed of pressure wave transfer is generally over 3,000 miles per hour.

2. As pressure goes so fast, a piece of pipe, say 15 meters long (approx. 50 ft), reflects it back to source in 0.02 seconds, or say at 50Hz. Another thought is that it will pass a 100 mm "T" branch in 0.00007 of a second! So a one connection damper on the T can not respond.

3. Frequencies from short lengths of system, must be addressed by flow through dampers.*

Diaphragm metering pump with HP and LP Flexorbers color cut sheet
*Flow through, dampers give:
More Flow Fluctuation Smoothing as well, PLUS
A. Pressure pulse interception
B. Flushability in place
C. Standardization
All at a lower cost!

If for some reason you really must not have these benefits, keep the lower cost, by using one connection and the other saves a "T" for Gauge, Drain, R.V., or Rupture Disk.

Principles of pressure activity reduction - briefly:
1. Pressure transients, going from a small hole into a large diameter space, die away exponentially with distance to the first surface they would reflect from. II. Additionally, mass of liquid deadens the pulse. III. When the cavity is also 8 times larger than the exit hole, what is left has difficulty fining its way back to the system.

Flexorber LP cross sectional descriptive color cut sheet

Importance of Prefill:
For a pressure pulse interception duty, to 50 % of system pressure, to keep diaphragm up & damper half full of liquid.

Installation options:
For Best Results, small connection to system for constant flow, larger to the pump for peak flows. Not more than 10 pipe IDs long.
Piping option cross sectional views at "90/90" and "45/45"

"Dampers that do - Flow goes through,
But Pressure Pulsation does not."

FOR INFORMATION ON LARGE DIAMETER, ELASTOMER DAMPERS click here

Shock Interception

by
PulseGuard Ltd. and Inc.

Return to Smoothness Level

Return to the beginning of PulseGuard, pulsation dampeners


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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