Flo-Dyne Standard Discharge Dampener

Flo-Dyne's standard discharge pulsation dampener to give a smooth running pumping system

Discharge Dampener Get a quotation Frequently Asked Questions

Pulsation dampeners are often necessary for multi-plunger high pressure reciprocating pumps which produce damaging levels of pulsation and vibration. These forces can be significantly reduced by the Flo-Dyne non-charged maintenance-free pulsation dampener which is completely filled with the pumped liquid. Our unique spherical in-line design results in optimized low weight and cost and is ideal where rubber bladder or metallic diaphragm types cannot be applied.

Should you require, for our standard dampeners, we can model your system, analyse the pulsation levels and simulate the mechanical response, with the same detail and rigour as needed by API674.

In many cases we can show you that a smooth running system can be achieved with dampeners that are smaller, lighter, and so cheaper, than that required by API674.

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Liquid filled pulsation dampeners work due to two crucial features of the design.


The volume is selected by Flo-Dyne to provide sufficient bulk so that when each plunger discharges its slug of liquid the compressibility of the liquid will absorb a proportion of the pulsation energy. The volume of the dampener must be chosen to be massive compared to the slug of liquid discharged by each plunger on each stroke, and not too large as to be uneconomical for manufacture.

Where required we can offer discharge pulsation dampeners that work upon this feature of compressibility of the volume alone, however such dampeners tend to be both massive and expensive.

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Pressure drop

Every Flo-Dyne's liquid filled pulsation dampener has inlet / outlet nozzles which impose a back pressure onto the pump. It is well known that pressure drop alone will reduce pulsation levels, however, Flo-Dyne's proven arrangement will both impose a pressure drop as well as impart a rotational velocity to the liquid volume creating a fluid flywheel.

This arrangement improves on simple single orifice type arrangements and introduces additional energy absorption within the sphere due to flow path of the liquid within the sphere and friction losses at the walls of the equipment that simply are not there with simple flow through designs.

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Proven Design

The Flo-Dyne liquid filled pulsation dampener is a proven design which has been keeping reciprocating pumps running smoothly for over 40 years.

The equipment is maintenance free with no moving parts and may be permanently welded into the line. Typically the dampener will reduce discharge pressure pulses by 75% depending on the type of pump, connected piping system and liquid handled.

This is a true Fit and Forget solution

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Carbon steel construction is standard, but other materials such as 304/316 stainless steel, duplex or super duplex steels are available for pressures ranging from 50 BarG and upwards to match the rating of your piping.

If you can design the piping can take the pressure, then we can build a dampener that will fit right in. Whether this just requires some straight forward pressure vessel calculations, or fully detailed Finite Element Analysis (FEA), to prove the design our in-house engineers will provide you with the detailed assurance that you need.

Units can be built to all British, European, American and Indian pressure vessel codes, with CE marking applied, as standard, for equipment that will be operated within the European Union.

Fluids handled are:

Water, Ammonia, Carbamate, Hot oils, Bitumens, CO2, MEG, TEG, plus various hydrocarbons

Get a quotation Frequently Asked Questions

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Flo-Dyne Controls (UK) Ltd

Flo-Dyne Place, Asheridge Road, Chesham, Bucks, HP5 2PT, UK
Tel: +44 (0) 1494 770088
Fax: +44 (0) 1494 770099
Email @ sales@flo-dyne.net

Contact us from: UK, Europe, Russia, Africa, North America, Central and South America

Flo-Dyne Controls (India) Pvt Ltd

2501, G-Square Business Park, Plot 25&26, Sector 30, Vashi, Navi Mumbai, India
Tel: +91 77-384-97-300
Email @ sales-india@flo-dyne.net

Contact us from: India, Asia, Middle East, China, Indonesia, Australasia, and New Zealand