DanCampbell

First airbrush - Airpro question

6 posts in this topic

Hello,

I have never used an airbrush but I am going to order one, I'm not sure what I need.

I am looking at the Airpro PS800 and the PS900.

What does a MAC valve do and is it worth it?

Any advice or information would be great.

Thanks

Dan

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A MAC valve is a feature that allows you to adjust the air pressure going through the brush. It's redundant with the pressure control on your compressor but it's a nice feature if the compressor pressure control knob is not handy to reach during airbrushing.

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I reduce pressure to shoot details, down to as low as 15 psi for some shots. That doesn't happen a lot - maybe 2-3 times during a session. I use an Iwata that does not have a MAC valve but my compressor sits on the table so it's handy to adjust pressure and look at the pressure gauge to get the right air flow. I don't know how guys who use a MAC valve do it exactly - maybe adjust the MAC and shoot a little paint to see if the pattern is right. I usually shoot details with painting templates and don't want to be blasting paint because the paint can get blown under the template at high pressure.

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I have both types and I would suggest getting the MAC valve when your first starting out. After a while you will get to where you can shoot fine details freehand w/o reducing the pressure, but the valve will make painting easier.

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It has always been my understanding that a valve of any type can only reduce the flow or amount of air that is passed from one side of the valve to the other. It takes a regulator to increase or decrease the p.s.i. (pounds per square inch) or "pressure".

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