I am using an air diaphragm pump setup with a 9 gallon, 11 cfm compressor. I can't seem to shoot more than about 20 feet. I know some guys can get about 40-50 feet shooting distance but maybe that is with a different type of setup. I tried using a larger nozzle (about 4 mm), but I still only can shoot about 20 feet only with more volume. Anyone familiar with my setup who can can offer some advice?
I think I am using a 0020 and have tried up to 100 psi. Increasing the psi over 75 doesn't seem to help. I'll try increasing the nozzle to 0030 and 0040 and see what happens.
Try not to set your psi over 100. The sudden burst of psi can damage the diaphragm. Get an external regulator that you can set between the pump and the compressor. You can get them at Lowes or HD for $10-$15.00. It will save your pump.