Pulsation Dampers

Preventing pulsation caused by the mass of a liquid system

Membrane Type Pulsation Dampers Product Range

A Pulsation Damper is a pressure vessel that reduces pressure variations and flow fluctuations.  The damper is often divided into two sides by a flexible membrane, diaphragm, bladder or flex-tube; one side containing compressible Oxygen Free Nitrogen Gas (OFN) and the other side is the space through which the product (Liquid or Gas) travels. In the process of the OFN and the product pressure working against the flexible membrane the Pressure and flow variations are absorbed at the peak of the pulse and released back as the pulse tapers off. This results in reducing pressure spike and smoothing flow. Helping maintain the safety of both personnel and product, enhancing the system performance whilst increasing the equipment service interval and lifespan.


Flexorber (high pressure) : The Largest chamber diameter to port hole ratio (best high frequency pulse interception with flow velocity smoothing). Both types of damper work in the same way but are manufactured differently.


ShockGuards (low pressure): The Largest chamber diameter to port hole ratio (best high frequency pulse interception with flow velocity smoothing). Both types of damper work in the same way but are manufactured differently.

Bladderless Pulsation Dampers Product Range

Bladderless (or maintenance free) Pulsation Dampers are solid state no moving parts, bladder and gas free acoustic pulsation dampers. The benefit of Dampers of this kind is that they are maintenance free. The compromise is the size of  vessel is much larger than an equivalent bladder/diaphragm type unit and the initial purchase price is also higher however this evens itself out over the lifespan of a damper.


The WaveGuard Pulsation Damper works by accelerating the pressure wave of the working liquid to release it into a large volume of slightly compressible liquid (the working fluid). This then absorbs the pulse before releasing the dampened liquid back into the pipeline.
If you prefer a damper from our WaveGuard range, we will recommend one from our range to suit your requirements.

What is a Pulsation Damper ?

A Pulsation Damper is a liquid pressure container that reduces pressure variations and flow fluctuations . The container is often divided in to two sides by a flexible membrane, diaphragm, bladder, flextube, one containing compressible nitrogen gas, and the other side through which the liquid goes; in the process the liquid pressure and flow variations are reduced or “dampened”.

Where does Pulsation come from ?

Pulsation is caused by the mass of a liquid system being accelerated and decelerated by a pumping action, or the repeated opening and closing of a valve.

The most exaggerated form of pulsation comes from simplex diaphragm type “metering” pump systems. Lesser pulsation is seen when duplex pumping . Triplex pump piping experiences even less pulsation.

Why is a Pulsation Damper necessary ?

A Pulsation Damper in the first instance is a safety device, installed to reduce fatigue in the system and therefore reducing the risk of system failure. Increasing the safety of personnel, the environment, equipment & infrastructure.

Pulsation Dampers are also used to reduce pulse and cavitation caused by inconsistent flow on the suction side of the pump. Without a damper in place the effects of cavitation and pulse will resonate throughout the system causing unnecessary wear on the pumps and pipe system as a whole along with reducing its lifespan whilst increasing maintenance interventions and reducing production time.

Pulses caused the pump itself result in pressure & flow fluctuations and contribute to the same additional wear and damage as previously mentioned. Pulse in a system increases noise levels and introduces variation into any dosing or mixing process.
All pumps and compressors create some degree of pulse and Pulsation Dampers are a proven solution.

Where is a Pulse Dampener installed ?

For best performance a Pulsation Dampener should be installed at the start of the pipe down which the flow has to be forced or when the dampener is to perform as a suction side acceleration head loss reducer, then the installation is after the suction supply line at the entry to the pump inlet check valve.

Generally a pulsation dampener is installed as close to the source of the pulsation as possible, most commonly is next to the suction or discharge side of the pump, or next to any pulse creating valves.

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Originally set up in 1963 as HydroTrole supplying High Pressure Hydro-Pneumatic Equipment to the Petrochemical Industry. In over 60 years of trading,