Stopping Water Hammer Problems 20-1

• Eliminate or control the problem. It could be caused by:
• A vibrating pressure relief valve.
• An emergency shutdown valve that seals too rapidly.
• Some manual valves such as butterfly valves.
• Install surge tanks.
• Allows liquid to flow in or out of the piping when water hammer occurs.
• Limited to water systems.
• Reduce the pumping velocity.
• Use a larger diameter pipe or reduce the flow rate.
• Use stronger pipe.
• A expensive fix.
• It’s a potential solution if the pipe specification is only slightly exceeded.
• Install pump flywheels.
• Used if a pump is slowing too quickly after an electrical trip.
• Slow down the valves. .
• Valves that do not close too rapidly could be used.(gate valves)
• Use surge alleviators.
• Similar to pulsation dampers only much larger. They are often fitted to positive displacement pumps.
• Install pressure relief valves in the system.
• Not suitable for use with toxic materials unless a catch system is provided.
• Use air inlet valves.
• Only if ingress of air or other possible external materials is not permissible.

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