PulseGuard Pulsation Dampeners

Fluid Flow Control Animations
PulseGuard Pulsation Dampeners
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Bladderless Zero Maintenance Pulsation Dampeners with No Moving Parts

Bladderless, Foamless Pulsation Dampeners / Snubbers with No Moving Parts

Bladderless, Foamless Pulsation Dampeners / Snubbers with No Moving Parts: Zero maintenance pulsation dampeners that attenuate pressure pulsation by use of a liquid to gas to liquid "phase change", or "release from solution". Dampeners that cause the distance between point of pressure pulse wave entry and point of exit to be a huge multiplicity of distances. And, dampeners that accelerate the velocity of the pressure wave, increasing its amplitude, then destroy the wave by exploding it into a chamber, within which chamber the distance to any reflection point is so great that the amplitude is decreased to an acceptable level.


Ram-Jet Orifice Type Pulsation Dampeners WaveGuard with Orifuce Pulsation Dampeners [WaG-RJ] No Moving Parts / Ram-Jet / Helmholtz Orifice

Pulsation Dampeners Sizes Dimension Tables, Weights & Cross Sectional Views on Viewsheet Pages Below
Recommended 1st step: Understanding how dampeners are installed will save $$
Pulsation Dampeners Installation Installation

Pulsation Dampeners Drawings and Viewsheets WaG-RJ No Moving Parts Zero Maintenance Pulsation Dampener Viewsheets:
     Ramjet, Spherical Empty & Helmholtz Orifice
     Ramjet& Helmholtz Orifice, 1 Gallon series

Pulsation Dampener Information HOW Wag-HO WORK
Pulsation Dampener Information The "Bladder" DIFFERENCE

WaveGuard Pulsation Dampener / Acoustic Pulsation Snubber WaveGuard Pulsation Dampeners / Acoustic Snubbers [WaG-CYL or -CER] No Moving parts / Acoustic / Bladderless

Pulsation Dampeners Sizes Dimension Tables, Weights & Cross Sectional View
Recommended 1st step: Understanding how dampeners are installed will save $$
Pulsation Dampeners Installation Installation

Pulsation Dampeners Drawings and Viewsheets WaG-CYL or -CER No Moving Parts Pulsation Dampener Viewsheets:
      Wag-CYL or -CER

Pulsation Dampener Information Wag MAINTENANCE
Pulsation Dampener Information HOW Wag/Cer WORK
Pulsation Dampener Information The "Bladder" DIFFERENCE

CavGuard Dampener CavGuard Dampeners [CaG] No Moving Parts / Suction Dampener / Cavitation Preventor

Pulsation Dampeners Sizes Dimension Tables, Weights & Cross Sectional Views on Viewsheet Pages Below

Pulsation Dampeners Drawings and Viewsheets CaG No Moving Parts Pulsation Dampener Viewsheets:
     CavGuard - Suction Dampener / Cavitation Preventor

Pulsation Dampener Information HOW CaGs WORK
Pulsation Dampener Information The "Bladder" DIFFERENCE




Zero Maintenance, Maintenance Free, Bladderless Pulsation Dampeners



Maintenance Free Dampener Selection






do not require servicing as they have NO MOVING PARTS.

THE ZERO MAINTENANCE PULSE DAMPERS are bladderless, with no elastomer membranes to be replaced.

SERVICING FREE DAMPNERS are welded closed with no seals or gaskets to be changed out.

Often called a “solid state Acoustic damper”, a no maintenance dampener is normally as large as the entire pump and its driver.

No maintenance “stabilizers” is a term usually applied to suction piping for reducing acceleration head losses.

The CAVGUARD is such a device, and uses entrained gas or vapor of the liquid as a cushion.

Flow through in line , no gas charge , with no elastomers, are also know as fit and forget pulsation dampeners.

For fluid flow systems where no gas charge is acceptable with no elastomers, “reactive” discharge dampeners , are also used for noise reduction.




Bladderless Pulsation Dampeners Selection Details




WaveGuard pulsation dampers will address pulse frequencies from 20Hz through 2000Hz, and are a broad frequency band approach.
WaveGuard ARE NOT designed on the basis of Helmholtz resonators. RESONATORS GENERALLY ONLY WORK OVER A NARROW FREQUENCY BAND.
Please see FREQUENCY below

1. The WAG-RJ is the simplest WaveGuard by PulseGuard Ltd, having acceleration tube "snorkes" which explode any pulses
at above 8 mis far from points of reflection, dissipating pressure energy as heat. Used from 20hz to 250 Hz.

2. The WAG - OC is as 1 above with thr addition of orifice chokes, thelenths and position of these "chokes" can improve pulsation
dissipation and thus reduce the necessary size of a WaveGuard to save space through not cost. These are more frequency dependent.

3. The WAG-CER (designated because theheball pack is notmally CERAMIC), is disperser. A pressure wave entering a WAG-CER
trvels hundreds of different lengthed paths, each path is of different length, the time to travel is different so that a
pressure wave is converted to a spectrum of waves having reduced amplitude. Best applied 200Hz t0 2000Hz

4. The WAG-COMBO combines the dissipation of WAG-RJ with the dispersion og WAG-CER, making the most effesient high
frequancy damper; through high cost.

5. PulseGuard creates many specials - give us your problems.


Frequency can not be predetermined without all system dimensions frequency changes with temperature, viscosity, density, and any pipe
additions, removals, and changes of direction to the system. The position for installation of a resonator is also critical according to wave
length from an analysis. resonators are not offered.

Application of liquid filled volume bottles for the purpose of reducing pressure pulsation from positive displacement pumps.

Using cold water as an example, with a modulus of 50e-6, (10 to the minus 6) the same as saying 5 to the e-5 (exponent minus 5)
which means 0.00005 volume change per bar pressure change, which is like saying 0.005% (per sent being two zeros) compressibility
per 15 psi change in pressure - which with a viscosity of 1cP results in an "acoustic" velocity (meaning wave speed) of 1440 meters per second.
To have a"minds eye handle on this" call it, say, "a mile per second", velocity of pressure. ("Acoustic velocity")


Relative costs: With Solid state, no moving parts, "acoustic" "reactive" - pulsation dampers
PULSATION DAMPER DEVELOPMENT a little more of the "Science".

If you make a pressure by for example striking a pipe with a hammer. If you isolate the pipe its self from transmitting the shock,
you will be able to measure thet pressure spike a mile away one second later (always assuming you have a transducer of
sufficiently fast response characteristics, and data capture at khz)

From the first paragraph, it follows that the compressability figures for each liquid at pumping temperature and pumping
pressure, must be known - otherwise it will not be possible to properly select the volume of a "Damper" to produce a
required level of pressure smoothness relative to the volumetric performance of a positive displacement pump.



Bladderless Zero Maintenance Dampener Selection



We can try to simlify the selection of suitable volume bottles by saying - 1 divided by 0.00005 = 20,000, So we find that we
can absorbe a ml or (1cm3) or centimeter cubic - or "cc" of cold water in 20,000 ml (or 20 Litres) by 1 bar pressure increase.

Unfotunately the higher the pressure at which the water is, the more dense the water has become, so the volume necessary
for the "volume bottle" pulse absorber will have to be increased still further.
BUT conversely the higher the temperature of the liquid the lower its density - usually given in grams per cc. SO the
compessibility rises with temperature. Making the huge volume otherwise necessary SMALLER.

The rise and cost of a "volume bottle" to supress VOLUME TRIC PULSATION coming from a positive displacement pump is
absolutely dependent on the liquid compressibility AT TEMPERATURE AND PUMPING PRESSURE.

A 1 ml pulse would need 20,000 ml to compress to reduce to a 1bar pulse 20 Liters.
A 15 ml pulse would need 300,000 ml to compress to reduce to a 1 bar pulse 300 Liters
A 50 ml pulse needs 1 million ml to compress to reduce to 1 bar pulse 1000 Liters



  • When no moving parts is required.
  • For use as an acoustic filter.
  • Dampers for diffusion.
  • As an acoustic silencer.
  • Helmholtz resonators.
  • As dissipative pulsation dampeners.
  • As an orifice pulse damper.
  • For pressure wave dispersion.
  • Used as a resonator.
  • When solid state is required.
  • As reactive dampners.
  • As a pulse absorber.
  • For high frequency and low amplitude.
  • When maintenance free is preferred.
  • When bladderless dampeners are specified.
  • When no elastomers or plastomers are needed.
  • If no foam (maintenance free) is specified.
  • When flow through dampeners are preferred.
  • For hydraulic noise reduction.
  • To hold pulsations constant over broad pressure range.




Do not select a pulsation dampener until you know how to connect it to your pumping system

Pulsation Dampener PDF Information PulseGuard.com PDF Catalog Online


Fluid Flow Control Pulsation Dampeners