See PulseGuard.com, our new American site for your pulsation damper needs!
or the new Liquid-Dynamics at site Liquid-Dynamics.com
LDi have been preventing shock, pulsation, pump start-up surge and water hammer for over 35 years. We offer both prevention hardware and software analysis.
Liquid Dynamics Inc. was formed in 1962 and has been dedicated to smoothing flow for the chemical process, hydrocarbon exploration and production, and hydraulic fluid power industries ever since.
We have plants in the USA and UK. Products are manufactured under a quality system, previously: ISO 9001:1994 [DNV Nbr. 95-LON-QA-458 (15105)]. And jointly: ASME "U" Cert 29,289 5 Nov '96 through 5 Nov '99, and through 5 Nov '02 [Kemper/BVQI - QSC 97028/50591 1997/98]. Now via LDi UK - RSA to ISO 9001:2000 valid through 6 October 2007. When you require products assembled under the auspices of that third party they will come via that UK source. We supply hardware (178,123 different products licensed from Martin Packer (Patents, Designs, and Tech Support)) and software for pulse and shock analysis.
In addition, we can provide analysis based on oscillographic data capture, finite element analysis using ANSYS, and pipe vibration frequency analysis using Caesar II.
For more information on shock, pipeline water hammer and pump start-up surge, go to
For more information on pulsation damping and prevention, and acceleration head loss preventors, go to
For more information on accumulators and hydro-pneumatic pressure vessels, go to
Alternatively, find out more about Liquid Dynamics or look at our various trade marks and products.
Liquid Dynamics Inc.
If you have a pipeline or pump user problem which requires pulsation analysis, diagnostics, or prediction by software:
The definitions of many problems can be found at Liquid-Dynamics.com.
LDi will be the world leaders in pulsation and shock analysis and prevention by focussing on quality, customer satisfaction and innovation at all levels throughout the company. Liquid Dynamics Inc. will be the world leaders in supply of hardware, spares, service, help and advice by following the lead of LDi.
ShockView enables us to quickly and accurately run your proposed piping system, in our computers, and tell you what the maximum level of pump start up surge, or shutdown shock will be. From this first model, which is free to you, we can then determine which of our alleviators is most suited to the needs of your system.
If you wish further models of your system, please contact Liquid Dynamics International in Europe with at least the following information:
"L" Length, "Di" Internal Diameter, "t" Wall thickness, "bM" Material, (modulus if known)
Flow rate "Q" Kg/Sec. if known, SG, cP viscosity at temp.
Pump manufacturer inertia data:
"S" Seconds Spin-up time (the most important figure.)
|PulseDoctor and ShockDoctor DIAGNOSTICS
You have the hardware already? LDi has the tools Certified calibrated signal conditioned transducers. Real time massive paper rate, oscillograph printers. GPIB data stream capture laptops, with FFT analysis. Yes even stethoscopes! Let us identify the heart of the problem, on site.
You have the dimensions, we will generate pipe response characteristics.
Identify and predict the results of valve action.
Find the pipe shake from pump start-up surge. Enable you to design "Water Hammer" out of your system.
|PulseView SOFTWARE MODELS
Before you invest in system hardware, LDi will run it for you. A "no witchcraft" easy to read set of oscillographic printouts, show you any system dangers, from frequency and amplitude. Allows you to choose the right pump speed and pipe lengths, before your budget is spent.
|PulseView||Graphical pulsation analysis program|
|ShockView||Graphical water hammer shock analysis|
|Liquidamics||Hypertext screen show software|
|SysView||Piping system model software suite, including the above software|
|Pulse and Shock Dampers|
|Flo-Gard||Valve, stops flow when shock bursts pipe|
|Flexorber LP||Flow-through shock and pulse interceptor|
|Pipehugger LP||Flow-through shock and pulse preventor|
|PumpGuard||Clear flow tube type suction cavitation preventor|
|SurgGuard||Pump surge dampner (start-up) / absorber / preventor|
|PipeGuard||Gas bladder type pulsation protector|
|TubeGuard||In place flushable damper|
|WaveGuard||Resonance prevention waveguard|
|Waveguard||Acoustic shock preventor|
|PermaCushion||Pre-fill cushion foam|
|PipeHugger||Connects direct to pumps to stop mass acceleration loss|
|Flexorber||Like a Pipehugger LP for higher pressures|
|LiquiCrat||Liquid inside the bag for shocks in corrosive systems|
|JumboFlex||Gas bladder tank for standby shock in non-corrosive systems|
|PistoFlex||Piston with diaphragm - instant response|
|PistoLite||Sealed closed - no hydrolock, separate bearings|
|MagDacc||Magnetic position volume indicating accumulator for remote readout|
|Indacc||Cascade control for multiple pumps; gives variable flow|
Liquid Dynamics International, technical services, diagnostics and analysis and data capture wtih software models. PulseDoctor & ShockDoctor technical services, PulseView and ShockView diagnostics are studied by software computer models or pressure diturbances. Place in your Input, project specifications, all necessary data requirement. Examples of analyses are available.
Click Here or Here to see small publications called Pumps are Pulseless.
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.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.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.