Posted 4/27/2013 17:56 (#3066384 - in reply to #3066184) Subject: RE: Raven NH3 flow control "hunting". valve cal help please!
Bethany, MO
What are you running for manifolds? You need to create back pressure so the control valve is in the open part of it's operating range. Manifold pressure should be 50-75% of tank pressure. That low rate with no backpressure makes the control valve do all the metering. It can also do a poor job of putting equal N to each knife, but that's harder to see.