Liquid Dynamics
Pulsation Analysis, Diagnostics, Prediction by Software
Pipeline and Pump user Problem -
Pulsation Analysis, Diagnostics, Prediction by Software
LIQUID DYNAMICS Ltd. offer Pulsation / Vibraton and Shock - Analysis & Diagnostics + Software Models
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OSCILLOGRAPHS
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Suction system pulsation samples shown by oscillograph plot 6 examples
Stable circuits with gear pump - Typical packed plunger systems Gear & Packed
Plunger Systems
Dosing and mixing system flow fluctuations Dosing, Air Op. &
"Metering" Systems
Valve Action Mass Oscillation - Velocity Jump - Membrane Response Plunger & Valve
Motions
System Startup Surge, Backflow Bang, Valve Deceleration Hammer Multi Plunger &
Centrifugal Systems
System Pressure Amplitude @ Frequency - Determine Acceptable Maximums Acceptable
Maximums

Pulsation Analysis PDF Catalog - Liquid Dynamics PDF CATALOG
LDi Pulsation Analysis Contact Page CONTACT US

LDi Catalog Printable PDF18

LDi Pulsation Analysis - target image Triplex reciprocating plunger pump - analysis of motion, valve action mass oscillation, velocity jump, membrane response

To understand the normal pulsation signature of the triplex test shown here it is necessary to examine the plunger and valve motions that cause the mass transfer velocities, before study of pressure response plot A. & discharge plot B.






(note below in graph says) Bar 1 NOTE:- Log scale change - otherwise shock amplitude would take the entire page.


From report by Yuri V. Gerasimov, Technical Director Liquid Dynamics Inc. March 1994. Subject German pumps for Exxon. Cause the effect review M. Packer.

 
Strokes of a triplex piston pump displacement or forward stroke, suction or backwards stroke Pressure generation against system resistance inside the plunger chamber Suction check valve stroke, note the opening delay of 28 ms during the decompression of the red cylinder Suction mass flow kg per second caused by pressure difference, supply line to in pump cylinder Suction system pressures excited by the velocity jump from valve delay and mass oscillation Discharge check valve movement, note the overshoot and rebound, indicating valve stop allowing more than 25% of critical diameter travel. Discharge mass flow from the individual cylinders, then combine for theoretical steady state. Discharge pressure at check valve outlet, response to mass decompression explosion and Joukowsky shock. Note: Log scale change - otherwise shock amplitude would take the entire page. Individual dampeners per cylinder, note stiff “FlexFlon” membrane stroke response to high frequency pulsation
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Liquid Dynamics International provides pipeline and pump user problem analysis, diagnostics, prediction by software, pulsation analysis, piping system analysis, and piping system simulation. For water hammer and shock solutions pulsation dampening and shock alleviating devices can be obtained from our associate websites:
  PulseGuard Inc., and Ltd. for further information about pulsation dampeners / pulsation dampers.
PulseGuard.com - Pulsation Dampeners
Pulsation-Dampeners.com - Pulsation Dampener
PulseGuard.co.uk - Pulsation Dampers
PulseGuard für Deutschland - Pulsationsdämpfer
  Shock-Guard.com and ShockGuard.co.uk to find large gas bag vessels, jumbo bladders, float separator / big bellows type pipeline shock attenuators and expansion / contraction volume compensators, surge alleviators, and shock alleviators.
Shock-Guard.com - Surge Alleviators
ShockGuard.co.uk - Shock Alleviators
  Accumulators-Hyd.com and Accumulators.co.uk for information about energy saving in pumping systems, standby emergency power, safety shutdown systems, hydraulic accumulators, and hydropneumatic accumulators.
Accumulators-hyd.com - Hydraulic Accumulators
Accumulators.co.uk - Hydropneumatic Accumulators

Hydraulic and Control Engineering since 1963; See also: Hydrotrole.co.uk Services for Hydraulic and Pneumatic Equipment Recertification and HydroTrole Limited Accumulator Types
  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 with flow fuses and breather bags
Flow-Guard - Flow Fuses and Breather Bags