"All air compressed by cycled or rotated pumps will contain static
electricity, unless it has a certain percentage of water vapor... in
addition to the other problems. "
The problem isn't so much that the air is compressed as it is that it passes
along a rubber or plastic hose at high speed and gets ionized by the
friction in the process. This can be completely eliminated by using a metal
nozzle and grounding that nozzle, though of course most people who use pumps
aren't going to do that. Similarly, the problem with water/oil in the air
can be eliminated using an inexpensive water trap filter.
Blowing air can also be used to *remove* static; I know people who do this
with their LPs.
David
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