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WHY DO YOU NEED A PULSATION DAMPING? SMOOTH SYSTEMS From the Pictures Below, choose your required level of residual flow and pressure stabilization, then make a note of its percentage number, also known as Allowable Residual Fluctuation Figure.
Dampening for Complete Atomization?	Dampers to Protect Your Instruments?
Dampen to Stop Pipe Shake, Fatigue, Weld Cracking, & Over Stress Unions, Flanges, & Fittings
	Pulse Dampers Stop Weepage? Premature Disk Rupture?
Pulsation Damping Stops Paddle Wheel Meter Surging?	Dampening to Enable Use of Vortex Shedding Meters?

Each reason for flow fluctuation reduction and or pressure pulsation damping needs a greater or lesser level of residual smoothness after damper installation. Each type of flow of mass meter has a level of disturbance above which it becomes inaccurate. The pipes of each system are different, and the level of and rate of pressure change above which shake and fatigue fracture, will be caused is different. The purpose of this page is to allow you to choose a suitable level of residual disturbance that may suit your system, without "over kill". Generally dampers increase in cost by 50% for a doubling in size.
For example a damper for +&- 1% residual, may be 4 times larger than one for +&- 4% residual pulsation. To go from 4% allowable to 1% allowable the damper size will have doubled then doubled again. Probably, the cost of a damper for 1% on a given system will cost 225% more than for 4% residual, and will use 4 times as much space.
Over specifying dampers makes systems softer than necessary; this can introduce control problems, and dead space.

Pumps Parts Protection?	To Allow use of Set Frequency Mag. Meters?
To Reduce the "Ratching" of your Turbine Screw Meter?	For Coriolis Meter Purposes?
For Producing Better Static Mixing?
To use a sharp edge Orifice and a Differential Pressure Gauge?
OR SELECTION IN ACCORDANCE WITH API SPEC. MECHANICAL DAMAGE PROTECTION The level of allowable pressure pulsation, depends on three factors 1. Diameter of pipe. 2. Operating Pressure 3. Pulse Frequency A Nomogram - or "3 axis Graph" - to help you specify allowable residual pressure fluctuation has been included in "Size Calculations" PDF of this page

Knowing how smooth you need a damper to make your system become, is the most
important information from which to select a damper.

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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.
The Smooth Flow People

Call Toll Free 1-888-DAMPERS (326-7377) / See also: Pulsation-Dampeners.com for a pulsation dampener.