The Pipeline Shock Prevention People
Pump Start-up surge, Valve closure shock, Pump shutdown back flow bang.
Large vessels for high pressures with matching bladders, diaphragms, gas bags, and bellows, for over a third of a century.

ShockGuard Ltd. offer shock alleviators. | Please phone USA 910-270-2737
We have people not voicemail. | Call toll free 1-888-DAMPERS

Fluid Flow Control Animations
Fluid Flow Control Animations


The amplitude of the surge is from the mass and time in which to be accelerated.
It is critically important to make an accurate estimate of pump spin-up time.
Frequency is from pipe length.


For liquids that will not require a corrosion resistant vessel shell.

For liquids where, being in the bladder, saves having a corrosion resistant shell.

Used where a suitable bladder Flexorber size or liquid compatible material is not available.

When your liquid compatibility requires PTFE, Flexflon, or DuPont virgin teflon.

For extreme temperature

shock alleviators - schematic of a cnetrifugal with various options placed close to the valve
liquibello thermal compensation pump start up surge guard thermal compensation floatolator jumboflex for valve closure shock surgeguard for pump start up surge floatolator for thermal compensation thermal compensation liquibello low pressure flexorber Click on the picture or names for product pages
The problem - shock frequency wave
The faster the valve closes, the higher the pressure spike. It is very important to put an accurate figure on valve closure time.

LDi - analytical and modeling services and software Visit LIQUID DYNAMICS Intl. Ltd. LDi offers analytical and modeling services. They predict these and similar problems, before pipe systems are built. ShockGuard is a licensed run time user of the LDi Ltd. software, ShockView. ShockView enables us to quickly and accurately run your proposed piping system, in our computers and you what the maximum level of pump start up surge, or shutdown shock will be. Centrifugal pump, start-up surge, shut-down shock


ShockGuard Shock / Surge Alleviators and Accumulators
Water Hammer and Pipeline Shock / Surge Prevention Equipment
STOP Pump start up surge, Valve closure shock, and Shut down back flow water hammer.
Call Toll Free 1-888-326-7377, UK Europe -- 44(0)161-480-9625, or Contact Us Online.

Understanding How it Works
Shock alleviators and shock accumulators do not alleviate shock, nor do surge alleviators and surge accumulators alleviate surge. SurgeGuard, JumboFlex, and Floatolator all work in the same way. They provide a soft place, so that the pump does not have to instantly accelerate all the liquid in the pipe system when it starts. Similarly, they provide a place into which flow can continue, for a time, against increasing resistance, when a a valve has been slammed. In both cases, because time has been increased, peak pressure generation is decreased. In short, they all prevent the peak pressure from being generated. /

Other Important Sites to Help You

Fluid Flow Control The Fluid Flow Control Source Pumps Accumulators Filters Dampers Heat Exchangers Valves Mixers P.I. / Pressure Indicators Controls Meters Vessels