What happens when we close the valve in discharge line while the pump still working?

eiddy

• Jun 1st, 2017

Water hammer phenomena takes place due to the pressure rise.
Closing the valve suddenly causes revers flow (reaction flow) may damage the pump or elbows if exist.

pawan kumar singh

• Nov 1st, 2016

When the discharge valve is closed in the running condition of a pump then the friction between pump impeller and liquid generates heat which increases continue and hence the fluid gets vaporized which causes problems of cavitation.

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