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Thumb rule for surge pressure calculation

thread1083-415870

Thumb rule for surge pressure calculation

Thumb rule for surge pressure calculation

(OP)
Hi could any tell, how to quickly approximate surge pressure due to valve closing or pump stoppage?

Also I want to know if the surge pressure be more than pump dead head pressure due transients repetitions?

Thanks a lot !

RE: Thumb rule for surge pressure calculation

Nobody answered so here's a shot from the building industry. During a fire hydrant test, the hydrant valve stem failed and the valve slammed shut. The resulting (what we call) water hammer, caused an 8 inch sprinkler main in an adjacent building to drive itself and attached sprinkler laterals right out the end of the building. It was a wet system and system pressure could never approach that. A truly fantastic sight!

RE: Thumb rule for surge pressure calculation

Use the Joukowsky equation - assume the flow is instantaneously stopped.

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