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Posted by Paul on June 22, 2007 at 06:42:43:
I have three boilers, all fed with their own feedwater pump, but fed through the same line. Each boiler has it's own automatically controlled feed valve.
We have a massive water hammer effect when the pumps cycle. It's been like this since I started here (3 years) and no one tries to correct it. Now I'm trying.
From my studies, there seem to be 2 ways to control this. One is controlling the ramp up and ramp down of the feedwater pumps with a motor controller.
The other is by installing a dampener.
I'm wondering what do most of you suggest. If I go with controllers I know I need one per pump. If I go with a dampener though do I need one per pump, or would one suffice for all three?