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Applications

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Pump Startup & Shutdown

Pump Startup & Shutdown

Problem: AGI Industries was contacted by a local construction company doing the construction on the West Closure Complex Pump Station in New Orleans, Louisiana. This is one of the largest pumping stations in the United States and is part of the Hurricane Protection Project. During heavy storm conditions, including hurricanes, pumps can inadvertently shut down due to power failure. Pumps will also quickly turn back on when power is restored. When this sudden start/stop of the pump occurs, fluid in the system will change velocity rapidly and can actually reverse direction. New incoming fluid can collide with this reverse flow as the pump restarts. This event causes a severe water hammer effect that can damage piping, valves, and the pumps.

Sump Storm Water

Sump Storm Water

Problem: The Park Royal Hotel in Sydney has two large Flygt submersible pumps which operate automatically to pump out storm water and seepage. The pumps are installed in a sump in the basement car park. When the pumps shut down due to low level in the sump, the backflow of the storm water still in the discharge line returned against the check valve at the pump's discharge. This caused severe pipe vibration and water hammer. The force was so great that the pipe, mounted on the basement ceiling with brackets and Ramset dyna-bolts, was dislodged, landing on expensive motor vehicles.

Water Supply

Water Supply

Problem: A major producer of water treatment chemicals accessed their local water supply through a 3" PVC pipe with quick closing valves. When the desired quantity had been measured and the valve shut, a water hammer effect with pressure spikes that exceeded the PVC pipe's burst strength was created. The PVC repeatedly broke, causing the entire plant to be shut down for repair. In addition, since pipe failure occurred under a nearby highway, it also had to be closed.

APPLICATIONS
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