Liquid Dynamics
Liquid Dynamics Inc. Techincal Services
LIQUID DYNAMICS Ltd. offer Pulsation / Vibraton and Shock - Analysis & Diagnostics + Software Models
Please call toll free USA 1-888-326-7377 WE HAVE PEOPLE - Not voice mail. --44-161-480-9625 UK
Fluid Flow Control Animations
Fluid Flow Control Animations



"NEAR 1000 Hz." THIS IS NOT NOT NOT "CAVITATION" AS, THE TERM IS GENERALLY USED PUMP MANUFACTURERS, but is as used by control valve manufacturers.


i) Short bursts
ii) High frequency
iii) Moderate to low amplitude
iv) 4:1 Dp ratio


Supply Pipe too small diam.or pump being run above design speed for the valves - valve opens too slowly, but supply pressure high enough, rolex replica once the supply column starts to replica watches uk surge forward, to bounce valve once. Strongish spring makes tiny gap before close. What we are seeing is disturbance from bubble implosions inside the pump chamber.


Valve seat replacement. Certainly prohibits use of swiss replica watches straight tube coriolis type mass transfer meters - which have aprox the same frequency for their excitation.


Live with it unless above residual allowable amplitude spec. Use a run-time of PulseView. Weaken the valve springs - or - put a suction loss Preventor close to the pump so that line size back from there doesn't have to respond to instant need for mass acceleration.


As many details as possible It always hinges on the DETAIL DETAIL DETAIL

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Liquid Dynamics provides pipeline and pump user problem analysis, diagnostics, and prediction by software. For water hammer and shock solutions pulsation dampening and shock alleviating devices can be obtained from our associate websites PulseGuard and ShockGuard.


For Hardware see our associate websites: and for further information about pulsation dampeners and pumping systems. and to find large gas bag vessels, jumbo bladders, float separator and big bellows type pipeline shock attenuators and expansion / contraction volume compensators. for more about pulse dampers in pumping systems and water hammer.
Water Hammer  and for more on water hammer, pump start up surge, shut down back flow, & valve closure hammer. and for information about energy saving in pumping systems, standby emergency power, and safety shutdown systems. for a quick view of how each different type of pulse dampener is matched to a pump installation. Pumps make flow, system resistance to flow is pressure, systems make pressure and pressure pulsation. to find protection against excess flow. Guard against toxic spills when pipes burst, guard against gushers and fluid loss when hoses split, Flow-Guard guards against excess flow floods.

Fluid Flow Control The Fluid Flow Control Source Pumps Accumulators Filters Dampers Heat Exchangers Valves Mixers P.I. / Pressure Indicators Controls Meters Vessels