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Pipe Surge and Water Hammer apparatus shows the transient effects of pipe surge and water
hammer caused by sudden flow rate changes in pipes. The apparatus has two separate test
pipes: one for pipe surge investigations and one for water hammer investigations. A header
tank (reservoir of water) supplies both test pipes. This tank includes an internal float valve
and an overflow for good engineering practice. A Hydraulic Bench (available separately)*
supplies the header tank with a controlled flow of water via an inlet valve. The outlets from
the test pipes flow back into the hydraulic bench. The test pipe for surge investigations
includes a clear plastic surge tower connected near its downstream end, and a control valve.
For surge investigations, students adjust valves to create a steady flow from the header tank
through the surge pipe. This flow creates a measurable head loss (due to friction) along the
surge pipe from the header tank to the surge tower. To create the surge, students quickly
shut the surge valve downstream of the surge pipe. The test pipe for water hammer
experiments has a special quick-closing valve at its downstream end. For water hammer
investigations, students adjust valves to create a steady flow from the header tank through
the pipe. To create the water hammer effect, students shut the quick-closing valve.