Liquid Dynamics
Liquid Dynamics Inc. Techincal Services
LIQUID DYNAMICS Ltd. offer Pulsation / Vibraton and Shock - Analysis & Diagnostics + Software Models
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Fluid Flow Control Animations
Fluid Flow Control Animations

CAVITATION:


(Does not imply that the pump CHAMBER will RAIL to FILL before the slowdown end of suction stroke).

Characteristic

FUGLY! "FLAT BOTTOM"

DESCRIPTION

i)Non active - ?? say - 23 Degs of rotation
ii)Line P jump to Vapor P - .?? Degs
iii) Then recovery to above V. P.
iv) Then implosion shock resonance

a) CAUSE:

Probable gas absorption in a local N2 padded, or "day tank". Insufficient suction pressure for Suc. valve mass &-or spring starting force &-or critical Diameter too small.

b) DETRIMENT:

Shorter pump life

c) SOLUTION:

Close coupled flow through Suction Acceleration Head Loss Preventor.

d) INPUT DATA NEEDED

S.P.M., SgG & CP' liquid, Line Length & Diameter, suction valve mass and stroke, spring starting force & rate.

NOT CAUSED BY

a) Suction line too long



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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:

www.PulseGuard.com and www.PulseGuard.co.uk for further information about pulsation dampeners and pumping systems.
www.Shock-Guard.com and www.ShockGuard.co.uk to find large gas bag vessels, jumbo bladders, float separator and big bellows type pipeline shock attenuators and expansion / contraction volume compensators.
www.Pulsation-Dampers.co.uk for more about pulse dampers in pumping systems and water hammer.
Water Hammer  and www.Shock-Alleviators.co.uk for more on water hammer, pump start up surge, shut down back flow, & valve closure hammer.
www.Accumulators-Hyd.com and www.Accumulators.co.uk for information about energy saving in pumping systems, standby emergency power, and safety shutdown systems.
www.Pulsation-Shock.com 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.
www.Flow-Guard.com 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.


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