Surge tank

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A surge tank is a standpipe or storage reservoir at the downstream end of a closed aqueduct or feeder pipe - as for a water wheel - to absorb sudden rises of pressure and to furnish water quickly during a drop in pressure. Also known as surge drum. An open tank to which the top of a surge pipe is connected so as to avoid loss of water during a pressure surge. (mining engineering) In pumping of ore pulps, a relatively small tank which maintains a steady loading of the pump.