Quick comparison video, The pump that moves the MOST air is the large 75L/M pump. This only has one diaphragm though, which is probably why it's so loud. One "Puff" every cycle of 60hz. The AP30A has dual diaphragms. A piston moves left/right 60 times a second. Left = Puff of air, Right = Puff of air. The airflow is smaller ( 30L ) but MUCH quieter. I think the airflow amount would work fine with laser cutting. I may consider two AP30A's and see if that does any difference. In the end of it, Only so much air comes out of the nozzle's small hole. It's more a game of what pushes the most pressure. If the 60L/M pump has less pressure, it could potentially waste a lot and hardly putout more than the 30L/M. I have no way to test the pressure.

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