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3M PPS Cups and Liners

#21
Because if I set up the gun with a full liner and it sprays in a particular manner, and it sprays in the same manner when the liner is almost empty, how can there be a flow restriction? If there were, I would get dry spray.
It seems to me, you might spray a product with the screen and have absolutely no issues. You might also have a little hogher viscosity with the next product you spray and have an issue when you least expect it. The screen is of no use for material that is properly mixed and filtered anyway so why take a chance? It just seems to be a no brainer to me.

I will not be spraying with the screen in.
john
 
#22
Because if I set up the gun with a full liner and it sprays in a particular manner, and it sprays in the same manner when the liner is almost empty, how can there be a flow restriction? If there were, I would get dry spray.
I am guessing you are doing it right. You are holding the gun upside down, pulling the trigger, and emptying the air trapped in the liner. For the heavier stuff, I like the pressure cup. There is a fitting at the bottom of the gun that pushes the liner creating a pressure pot effect. Its only on the 2.0 gun though. I have not had problems spraying with the 1.8, the the needle is too different to spray the low 1.2 and 1.4 heads.
 
#23
I have "old style" pps on LPH400, Pro-lite and LPH80 and have never experienced any flow issues. I wonder if this is a theory that just gets propogated by people rather than a real problem?
same here, although I'm game for trying the Placebo affect and see if I can paint better without the fitler.
 
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