>One (as yet unmentioned) solution is to equip the device with an air inlet >*and* a small bleed >hole. You feed cleaned / dried air ( or nitrogen if you are picky) under >modest pressure down >the air line. Works fine right up to the point somebody cuts costs by not >doing proper support >for the air supply …… > >Why cleaned / dried? Well, if you have ever run one of these setups, the >dryer cartridges put >a bit of white powder into the air output. Eventually you wind up with a pile >of white stuff “down >wind”. I have empirical evidence to support this …. :)
We had that the oil refinery: All important electrical installations were pressurized with dry nitrogen, mostly I think to prevent the airborne hydrocarbons from liquifying the plastic. The shop-joke was to manually tweak the central pressure regulator when somebody headed out to do maintenance, and see them get hit by a cabinet door swung outward by half an atmosphare over pressure :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
