Pulsation damper for pumps
Flo-Dyne

Multi-plunger high pressure reciprocating pumps produce damaging levels of pulsation and vibration. These can be significantly reduced by the Flo-Dyne non-charged maintenance-free liquid pulsation dampener. 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.

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

Volume
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.

Pressure drop
Every Flo-Dyne's liquid filled pulsaton 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 flywheeel. This arrangement improves on simple single orifice type arrangements and introduces the added benefit of flwheel smoothing as well as energy absorbtion due to increased friction losses at the walls of the equipment that simply are not there with simple flow through designs.