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

Shock Prevention Hardware

Click on the LiquiCrat to find out more about it.

Schematic of a water-hammer susceptible system
This system could have had a water hammer problem if the valve was closed to quickly or the pump was started up too quickly. The LDi LiquiCrat (provided it has been correctly sized and installed) will prevent any water-hammer occurring. When the valve is closed too quickly, normally all the liquid would have to suddenly stop. The LiquiCrat provides a space into wich the liquid can flow. As it flows into the space, it compresses a gas-filled bladder, so as the space fills, the bladder provides an increasing resistance. In this way, the liquid can be decelerated more slowly, preventing the formation of a shock wave. The same process happens when the pump is started up too quickly.

Alternatively, LDi's ShockView software can provide an analysis of the system to determine how slowly the valve should be closed or the pump started up to prevent the shock wave forming.

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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 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