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Kremlin/Water Base Primer1/7
if its single component, the primers usually have a high filler solids that are most likely falling out of suspension., i would flush the lines with water , leave water in it, they start in the am, the pumps don't hold that much fluid, better than losing fluid lines,
if you want to recover a fluid line, reverse the fluid line meaning put the pump end on the gun end and vice versa
i have saved a lot of money doing that, besure to remove the spray gun
I echo Herb's solution. I spray with a 10-14 pump and MVX gun. I was spraying Valspar's Zenith Universal Amber Primer(H2o) and did not thoroughly clean my fluid hose....the following day, tried to spray, nothing comes out. Thought my pump was broken. No, the primer had completely congealed in the hose.....plugged it up completely. Had to purchase a new fluid hose. Hence, I believe you have to clean with water first, followed by Denatured Alcohol to get the fluid hose clean. Who said spraying waterborne was chemical free!!!
I also spray the primer out of 2 Graco Merkur pumps which are very similar in design to the kremlins with no issues at all.
I plan on buying a 55 gallon pail mount kremlin with an agitator as a built in system but only when they resolve the current issue. It's not the kind of thing you break down every night. The sales rep is working with Kremlin on a solution. My guess is they will copy the GRACO design which has never had an issue.
interesting read, fittings cannot cause a material to harden unless a brass fitting might come in contact with a wb, even a galv fitting wouldn't cause an issue, i might be a dead spot where the pressure of the pump is shearing out the solids, i think what really is happening is the solids are falling out of solution much like the old lacquer days when you had to stir the finish to get the solids back into the material, very interesting that the graco doesn't do it with the same material, again thinking of dead space and sheering
will have to keep checking on this one
I was not referring to the composition of the metal fittings but more to the ability of them being air tight. I believe there is a weak point in the fitting that allows air to somehow get to the material. It only happens at the fluid outlet from the pump when the pump is kept under pressure.
The material itself could be sheering but it's hard to say. When you take the fitting off you end up cleaning out a hardened plug. It's identical on the 10/14 and EOS except it seems to even be a little worse on the EOS fittings. The material seems to harden further down the line.
I wonder if anyone has had this problem with any other pumps other then the Kremlin?? Binks, Falcon Etc.