Originally Posted by jrm21
And to echo avParsec's advice... be careful with compressors. Condensation in the tank can come out as water, damp air or something in between.
Valid warning, but most compressors I've seen and have, have a water trap regulator which traps most of the moisture that's got inside with the humid air. Also all compressor manufactures recommend you open the drain on the bottom of the tank to release the built up water on a regular basis.
Anyone who uses their compressor to paint with, will definately have a water trap regulator on it.
Pressure wise? ... that's up to you to decide, but if you keep the nozzle no closer than say 200mm away from the components you'll still blow the dust away and not cause any problems even at maximum pressure of the compressor. If you start to bring the nozzle within say 50mm you need to be careful with the delicate parts.
Above all, if you have a fan inside your receiver, do not allow the compressed air to spin the fan, as you can damage the fan at the far higher speeds it will spin at with the compressed air.
If you live in a dusty area, you want to do this with all your electronics gear, as dust traps heat, and heat kills components.
Also, as mentioned earlier do this outside, because if you do it inside you'll just get that dust back inside the receiver as it settles back down.