Thank you Ken. Thats the route I intend to follow. Scuba gear sounds interesting especially since I swim like a rock :-)
Regards Harsha Godavari Ode Coyote wrote: > A cheap diaphram type compressor should have no oil problems. Only the > piston types need to be oiled and they're more expensive. > Get your oxygen and reglators from a welding supply house. It's a lot > cheaper, same gas, same tank and no hassels. > ken > > At 09:18 AM 3/8/02 -0600, you wrote: > >Brooks: > > I have a query regarding this pump (and may be others of this > >type). Is there any possible oil contamination from it? I understand that > >oil could be a problem with tire inflators. > > > >I was going to use a small oxygen tank and discovered that I need to get a > >medical prescription to rent one of those. I have one those tire inflators > >sitting around, not being used ! > > > >Regards > >Harsha Godavari > > > >Brooks Bradley wrote: > > > >> During the past several days I have been > >> having an off-list dialogue with another list member...relative to > >> acquiring a smaller, less cumbersome unit that possessed some degree of > >> portability. I imposed on one of our technicians to investigate. > >> First, he tried to utilize several different aquarium pumps....none were > >> effective due to excessively low output pressure. Next he investigated > >> using the air discharge side of a high-quality vacuum pump. This was > >> workable, but cost-prohibitive due to requiring a high-efficiency pump. > >> Finally, through a serendipitous circumstance we chanced upon using a > >> little 12 vdc air pump available at Harbor Freight, for about $11.00.. > >> It is manufactured by Campbell Hausfield and the stock number is #36688. > >> > >> The system is comprised of the 12 vdc tire inflation > >> pump, one double gang aquarium air-control valve (Walmart 2..00), about > >> 4' of silicone airline tubing from Walmart (#JM005..2.44 m size. Costs > >> about .90 for an 8' package); a conventional air compressor gage...0 to > >> 100 psi indicated; one 1/4" air brush coupler # P-1655 from Harbor > >> Freight....cost about .99. > >> Assembly procedure: Cut the 4' section of silicone > >> tubing into two equal sections; connect one section to either of the > >> output connections on the aquarium gang-valve; after screwing the > >> airbrush coupler on the pressure gage, slip the remaining end of of the > >> tubing coming from the gang-valve over the exposed end of the air brush > >> coupler. Next open the remaining control valve on the gang-valve > >> assembly to Full Open (fully counter-clockwise). Now connect the > >> remaining (other) piece of silicone tubing to the single INLET > >> connection to the gang-valve. Open the end-cover on the Air Pump and > >> remove the little orange-colored nozzle adapter and screw it into the > >> discharge-outlet of the Pump air hose....but only about 2 or 3 > >> threads----any more and you cannot move the locking handle sufficiently > >> to unseat the discharge-line check valve (unless the check valve is > >> unseated, insufficient pressure will be achieved). Next, connect the > >> small end of the nozzle adapter well into the silicone tubing coming > >> from the gang-valve INLET. At this time what you have is the Air Pump > >> connected to the gang-valve; the gang-valve with one outlet valve > >> connected to the Air Pressure Gage and the other outlet valve OPENED and > >> vented to atmosphere. > >> Operation: With the system connected as outlined above, > >> connect the Air Pump to a 12 volt DC source (auto cigarette > >> lighter is excellent, since the furnished power connection is a > >> cigarette lighter probe). Any quality 12 volt battery charger may be > >> used, but be sure to connect to the power leads correctly. The center > >> contact on the cigarette lighter should be the (+) and the side-springs > >> should be the (-). With the system running as described the Air > >> Pressure Gage should be reading near Zero. Next, slowly close the > >> gang-valve outlet control (the one you left FULLY OPEN to atmosphere) > >> until pressure begins to indicate on the Gage; slowly continue closing > >> until the indicated pressure is 25 psi. If one or both of the hoses > >> blow off, just reinstall and push up snuggly. Friction pressure only > >> should suffice for 25 psi----if not, use some small-gage copper wire (28 > >> gauge is fine) sections (about 1.5" length) and wrap them around each of > >> the tubing connections and twist securely. CAUTION: This little pump > >> can develop quite high pressures under "dead-head" conditions....so one > >> should increase pressure slowly, unless you want to blow hoses > >> everywhere. Once you have the system working at 25 psi you, > >> essentially, have it calibrated for the specific valve settings and > >> "theoretically" should be able to operate it without the pressure > >> Gage----if you so choose (but I would not). If you choose to operate > >> without the pressure gage, all you do is to disconnect the Air Pressure > >> Gage and connect the air brush nebulizer inlet directly in place of the > >> pressure gage. DO NOT CHANGE THE SETTING ON THE VALVE VENTING TO > >> ATMOSPHERE. If you choose to keep the Air Pressure Gage in the circuit, > >> obtain an "inline" Tee connection (compatible with the tubing > >> size...Aquarium department, Walmart....about .80) Cut the main air > >> supply hose going to the gang-valve and insert the "T" valve (one end of > >> tubing from Air Pump and the other section going to the gang-valve > >> INLET. Now, using a new section of tubing of desired length, connect > >> one end to the remaining outlet of the "T" valve and the other to the > >> Air Pressure Gage's Airbrush Adapter fitting. What you now have is the > >> Air Pressure Gage sensing the input pressure to the gang-valve > >> assembly....CONTINUALLY. One advantage to this set-up is that when you > >> trigger the Airbrush Nebulizer, you can monitor the pressure drop. If > >> the pressure drop falls below 20 psi when you trigger the > >> airbrush.....just recalibrate your system to a higher initial pressure. > >> I suggest 30 psi. > >> Actually, the system is very simple to construct > >> and I have endeavored to explain to the lowest common denominator of > >> technical expertise. My goal is for the "unknowing" non-technical > >> person to be able to assemble this little system. > >> If you do not understand my feeble explanations, > >> just email me and I will try to answer in a fashion acceptable to your > >> comprehension. > >> Our resident "tinkerer" has done quite well (I > >> believe) in composing this simple address to the challenge for a very > >> economical, somewhat portable, airbrush air-drive system. > >> Sinerely, Brooks > >> Bradley. > >> > >> -- > >> The silver-list is a moderated forum for discussion of colloidal silver. > >> > >> To join or quit silver-list or silver-digest send an e-mail message to: > >> [email protected] -or- [email protected] > >> with the word subscribe or unsubscribe in the SUBJECT line. > >> > >> To post, address your message to: [email protected] > >> Silver-list archive: http://escribe.com/health/thesilverlist/index.html > >> List maintainer: Mike Devour <[email protected]> > > > >
