Centrifugal Pump Pulsation Dampeners

Centrifugal pump needs protection against pipe system frequency response & for start-up surge. FOR SHOCK, "WATER" HAMMER, BACKFLOW CAVITY IMPLOSION ETC. IT IS NOT POSSIBLE TO PRESELECT THE SOLUTION. PULSATION DAMPENERS FOR ADDRESSING RESONANCE, CONTINUOUS HYDRAULICALLY INDUCED VIBRATION, IN CENTRIFUGAL PUMP PIPING SYSTEMS

A common occurrence is, for a natural "wave speed frequency" of one of the lengths of pipe in the system, to return a pressure wave to the pump at a a frequency which coincides with a frequency at which the pump shaft will deflect, bend, or vibrate in its bearings.
This slight shaft movement, changes the distance from the impellers to the housing, and pressure fluctuation results. This is fed buy the returning waves before long the pump & pipe system is suffering from heavy pulsation. The solution is to decouple the pump from the pipe "acoustically" with a no moving parts pulsation dampener.

Acoustic Pulsation Dampeners:
1. WaveGuard Ceramic
2. WaveGuard Spherical HO
3. CavGuard Vertical

1. WaveGuard Ceramic CERAMIC BALLS Standing wave dissipation dispersal through a myriad of different length of flow path The "e" number is use in computing the reduction in system acoustic frequency due to increased "softness"

WaveGuard Spherical HO / WaveGuard Spherical MT ORIFICE TECHNIQUES Intercepts pressure wave pulsation back from the pipe system nodal lengths, and prevents them from feeding back to the pump impellers The "e" number is use in computing the reduction in system acoustic frequency due to increased "softness".

CavGuard Vertical For BACK-FLOW SLAM BUBBLE CATCHER Causes the generation of a bubble cushion chamber. The cushion softens the back flow slam from the implosion of the cavity drawn out by the flow away from the pump on shut down. The "e" number is use in computing the reduction in system acoustic frequency due to increased "softness".

Make a note of this pump's F number, also known as its Flow Fluctuation Figure. Use the F number with the % residual fluctuation required figure from the smoothness shown for each type of application. These two figures, the F figure and the % figure, applied to the size selection formula give you the smallest practicable dampener size.
A centrifugal pump has 11 blades, at 725 RPM it Displacers 500 gpm, 500 gals x 231 in3 per Gallon / 11 blades x 725 rpm = 14.5 in3 displacement.
F=7 @ 133Hz

1. Centrifugal system piping RESONANCE preventers below are from "off the shelf" inventory. Be sure to ring Free Phone/call Toll free for the current escalation and discount percentages. The size volumes listed have been pre selected to suit your pump connection norms, simply choose the type that is from your material of choice, with the connection that matches your pump; this will provide standard damping. Or call us to make the selection.
2. Where there is no occupational health and safety need for in place flush through before servicing, nor any process requirement for constant temperature, or first in first out need to control residence time, not even clean before changing liquids it is still least expensive to use a standard twin connection dampener, & save a "T". Use the other connection for the system drain, relief valve, or branch line. WaveGuard and dampeners for frequencies above 10Hz., systems shorter than 300 meters or 1000ft, must use FLOW-THRU. pulsation dampeners.

Sludge, Slurry, Hose, Peristaltic Pump Dampener Information: Pulsation Dampener / Pulsation Dampener Drawings / Pulsation Dampener Safety
See Also @ PulseDampeners.com: Centrifugal Pump Pulsation Dampeners and Gear Pump Pulsation Dampeners

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