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
CENTRIFUGAL PUMPS
with Various PULSEGUARD Dampers

Halving the cost and tripling the performance, dampening pipe resonance with centrifugal pumps.

PREVENT SYSTEM FREQUENCY RESPONSE INDUCED SHAFT VIBRATION Resonance pump shaft deflection PULSATION



A common occurrence is, for a natural "wave speed frequency" of one of the lengths of pipe in the system, to return a pressure wave to the pump at a a frequency which coincides with a frequency at which the pump shaft will deflect, bend, or vibrate in its bearings.
This slight shaft movement, changes the distance from the impellers to the housing, and pressure fluctuation results. This is fed by the returning waves before long the pump & pipe system is suffering from heavy pulsation. The
solution is to decouple the pump from the pipe "acoustically" with a PULSEGUARD Ltd. "WAVEGUARD", a no moving parts pulsation damper.


LIQUID DYNAMICS International Ltd. offer analytical and modeling services to predict these and similar problems, but the cost f a WaveGuard is often less than the cost of diagnostics and analysis. Exitational frequencies from "pressure wave speed" of "liquid acoustics" not only depend on knowing the exact lengths of all the pipe system nodes, but also on the effective compressibility of the system. Effective takes account of pipe wall elasticity, as well as liquid compressibility with entrained gasses, all of which change with temperature. Therefore unless you have a an absolutely constant temperature and level of gas absorption and or entrainment, it is more effective to install a WaveGuard decoupler, than to make analytical acoustical models.


WaveGuard /HO
Wag/HO/--/

Hemholtz orifice techniques and mass compressibility, where Delta is acceptable, in particulate free systems

WaveGuard /MT
Wag/MT/--/

Pure bulk modulus compressibility for dirt laden flows.

Flexorber /LP
TefCushion
Sog/--/--/TFE


The largest virgin PTFE, or EIDP Teflon pressure vessel diaphragm, 16" Diam / 450mm, 1,000in3 / 16.5 Litres and up to 6" / 150mm pipe line connection & from inventory.



Our associate lcensee ShockGuard
Ltd. & US Div. offer 4 types of alleviators for pump start-up surge, valve closure shock, and back flow hammer, in Sizes up to 2,000 Litres. For details please GO TO:- http:://www.shock-alleviators.co.uk

Centrifugal Pumps Centrifugal Pumps with Dampers - Technical

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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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