I have together with some colleagues built a 25 gallon brew set-up. The main concept was to have a large "pot" with a smaller basket inside to hold the malt. We then have a pump to recirculate the wort during mashing/lautering.
We started out trying to brew a wheat beer but from the second we started recirculating the mash was stuck... I know that there can be several causes for this, and one of them could be the recirculation rate. Our pump gives a flow of ~250 gallon/hour and that is probably way too much... I have found this article http://brewingtechniques.com/library....4/palmer.html
which gives me a max recirculation rate of 1/4 gallon/minute. The diameter of my "basket" is 15 inch.
I would like to know what recirculation rate you experienced RIMS/HERMS brewers use?