Surge Anticipating
Abrupt pump stopping is followed by
a pressure drop as the water column continues traveling along the line.
The returning column hits the closed pump check valve, creating a high pressure surge wave, which travels at up to 4 Mach.
Eliminating such surge requires anticipation and pre-action.
DVD Surge Anticipating Valves react to the pressure drop, accepting the returning column while already open, thus eliminating the surge.
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