Compelling Reasons #1: Constant recirculation in the BK..?

[Broken Crow]

Something I didn't give a lot of thought to, ...I simply implemeted it and haven't had any noticable issues. I have brain/spine/CNS damage and brewdays are hell, so to eleiminate having to do so much being vertical and using anything attached to my spine, (plus; having an issue with temp stratification in my keggle)... I run constant recirculation throughout the boil.
Is there any compelling reason not to do so?

 

[day_trippr]

Maintaining recirculation during the boil can be challenging as the suction pressure at the input to the pump's impeller chamber can cause "localized vapor break-out" (ie: steam) which in turn can cavitate the pump. Lowering the flow rate may reduce the propensity for cavitation to occur. If I try to run my March 815PL wort pump at full flow while the boil is on the pump will cavitate before long, but if I valve the flow back to ~50% it will maintain a modest recirculation through the boil.

That related, I usually don't have a good reason to run the pump once the wort is at boiling temperature, so I typically shut it off until it's time for whirlpooling or chilling...

Cheers!

 

[Broken Crow]

Maintaining recirculation during the boil can be challenging as the suction pressure at the input to the pump's impeller chamber can cause "localized vapor break-out" (ie: steam) which in turn can cavitate the pump. Lowering the flow rate may reduce the propensity for cavitation to occur. If I try to run my March 815PL wort pump at full flow while the boil is on the pump will cavitate before long, but if I valve the flow back to ~50% it will maintain a modest recirculation through the boil.

That related, I usually don't have a good reason to run the pump once the wort is at boiling temperature, so I typically shut it off until it's time for whirlpooling or chilling...

Cheers!

Thanks! That clears up something that puzzeled me when I started using my keggle... I'd assumed it was air-pockets and couldn't figure out where it was coming from...drove me a bit nuts, but going to a low instead of rollling boil and restricting the flow seemed to fix it. With the keggle, I mounted the heating element a bit higher than ideal and got some pretty severe temp stratification. The system I'm replacing it with has a proper flat bottomed pot so that shouldn't be such an issue.