But since friction head with turbulent (sprinkler) flow is proportional to
the velocity squared, and the data from Ron Greenman's link says 'K Value
for use in the formula hf=k(v^2/2g)', and the velocity varies as the flow,
wouldn't the K Value give us the friction loss 'curve' we are looking for,
as opposed to an average over a range?

-----Original Message-----
From: Roland Huggins [mailto:[email protected]] 
Sent: Monday, April 16, 2012 10:00 AM
To: [email protected]
Subject: Re: k -- WHAT?

I started to say before getting overly precise (but that horse has  
left the barn), it might be helpful to keep in mind that the K valve  
on a sprinkler is NOT a constant at different flows.  It is an  
AVERAGED result for flows from 7 psi to 100 psi.

Roland

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