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Shock waves are created in a pipe full of liquid when either a valve is closed too quickly, forcing the liquid column to stop moving more quickly than it wants to, or when a pump is started up too quickly, forcing the liquid column to start moving more quickly than it wants to. In either situation, the shock wave travels up and down the pipe through the liquid, banging against each end of the pipe.
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This banging can be heard as water hammer. Try it at home - turn on your tap, then turn it off very quickly. You should hear a bang, and maybe even several. If you turn the tap off more slowly, it should stay quiet, as the liquid in the pipes slows down more gradually. |
In industry, the pipes can be very large, and water hammer may not just be heard as a bang - it can cause a great deal of damage, even rupturing pipes. LDi can supply a range of hardware to prevent these shocks, and a complete software-based water-hammer analysis to recommend system modifications which remove the shock.
USA: Call toll-free...1-888-326-7377 or Fax toll-free....1-888-825-5357
or Write....Shockguard, P.O. Box 506, Hampstead, NC 28443.
or e-mail Pipe-Shock@Shock-Guard.net
Please note that due to the volume of email enquiries (some virus-suspect) we can only reply to those giving the name of the originator, company name and address with telephone and fax numbers.
Canada, Central America, South America & Caribbean USA:
Tel... 910-270-2737 --- Fax....910-270-2739
or e-mail Pipe-Shock@Shock-Guard.net
UK: Free 'phone.... 0321-LOW-EURO or 0321-LO-PRICE or Free Fax....0800-174088
or Write.... Shockguard Ltd., P.O. Box 47, Stockport, UK SK3-OLH.
or Email Shock@ShkGd.co.uk
Europe and All other Countries:
Tel...+44+ 161-480-9625 --- Fax....+44+ 161-480-9627
or Email Shock@ShkGd.co.uk
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