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

O.K. VALVE BEAT:


Characteristic
"VARYING FREQUENCY"

DESCRIPTION

i) Non active ??- say 30 degs
ii) Jump down
iii) No flat bottom
iv) Different time elapse between "beats". Called beats because it isn't on frequency as such.
v) rounded tops & bottoms

a) CAUSE:

Too Long Supply line or too large a diameter for the SG & CP of this liquid, and these suction valve characteristics . Valve stroke too short, by spring beingtoo strong for this supply line length.

b) DETRIMENT:

S different multiples of S.P.M.; One of which will probably clash with a pipe length vibration or acoustic natural frequency.

c) SOLUTION:

Can be single connection volume near suction.

d) INPUT DATA FOR A SOLUTION

Amplitude of fluctuations, & present length and diameter of supply line .

NOT CAUSED BY

a) Too high a suction pressure & YOU CAN TELL BECAUSE:
The tops would be spiky like this X, the moving valve member would percussion
7 rebound and there would not be so much lost | angle of rotation at i) .



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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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