/make/watch/watch/results/watch/watch/watch/watch?v=efaeYM0rpY0 was not found on this server.From: John De Armond Subject: Re: A/C Vacuum pump Date: Tue, 30 May 2000 16:58:41 EDT > I'd like to do a bit of A/C work on my '88 Grand Voyager, including > replacing the compressor & receiver/dryer. I could handle the job, if I had > some way to pull the vacuum on the system. Is there some way for a DIY'er > to get ahold of one? If you have an air compressor, you can get a venturi vacuum "pump"They're noisy, don't pull a good enough vacuum for drying but they will get the job done if all you need is to get the air out of an otherwise clean system. I have one that I've owned for a couple of decades. Believe I got it at NAPA. If you don't have an air compressor, the compressor from an old refrigerator will work fine. Since these compressors rely on the refrigerant flow for cooling, you must be careful not to overheat it These pumps are also good for recovering refrigerant.

quantities involved in auto systems, simply hooking the discharge of the compressor to a recovery jug does the trick. The walls of the jug serve as the condenser. this has an added advantage of not trapping any recovered liquid refrigerant in the recovery system. Important, considering how expensive refrigerants are these days. Silver solder shraeder valves on the inlet and outlet of the compressor and then you can hook it up with refrigeration hoses. For a cheap recovery tank, use a 20# propane tank. the valve and fit a refrigerant valve with a shraeder (1/4" flare) fitting or make a POL to 1/4" flare adapter. pressure curve is very close to R-22 so the tank can be used for either 12 or 22 or 134a. Be sure to label them so as not to mix X-Source: The Hotrod Mailing list Date: Thursday, Jul 21 1994 12:00:20 From: John De Armond >> One project I'd like to build would be a Freon recycling unit. >>tried to rent recycling units before, but _even_though_they_all_rent_

>>vacuum_pumps_ (at the current time), nobody will touch recycling units >>due to fear of the EPA Nazis coming down! >If you do get into recycling Freon then be sure that you capture >all the nasties that can exist in used Freon. Chocolate Lab Puppies For Sale Near Knoxville TnIn addition to waterSnow Tires For Volvo Xc90 >you may find HF, a product of decomposition of Freon. Usc Bookstore Rental Coupon Code >on the failure mode of the system there can be lots of other nasties My "recycling unit" consists of an old hermetic compressor from a refrigerator, a large suction line dryer (10 ton rebuildable)I test the freon for acid using the convenient acid test kit available from, among others, Sealed Power.

more than spraying a little mist on a test strip and observing the colorAcidic freon somehows manages to just leak away... :-) What I do is pump the freon from the system into a tank. has a decent inventory, I distill it by inverting the tank, connecting a gauge set to the tank and to the suction of the pump through the dryer so that I can use the valve on the gauge set as an expansion device, and connect the outlet of the pump to another cylinder. I invert the "source" cylinder and draw off liquid which I allow to very slowly expand through the gauge valve. Any non-condensables are trapped in the source tank vapor space. Dissolved impurities are carried to the filter/dryer and absorbed. The purified freon then collects in the receptacle tank, condensing on the walls of the tank. it takes several hours to distill a 30 lb tank of freon. the last liquid is drawn from the "source" tank, the process is stopped, the tanks disconnected and the residual allowed to er, escape.

Robinair (RG3) Portable Refrigerant Recovery MachineDetailsMastercool (62010) Gray/Yellow Refrigerant Recovery Tank - 30 lb. Capacity FREE Shipping. DetailsRobinair TIF9010A Slimline Refrigerant Electronic Charging/Recover Scale 14.8 x 11.4 x 8.5 inches #8,806 in Automotive (See top 100) #4 in Automotive > Tools & Equipment > Air Conditioning Tools & Equipment > Refrigerant Recovery Tools #28 in Automotive > Tools & Equipment > Air Conditioning Tools & Equipment > Air Conditioning Line Repair Tools 22.1 pounds (View shipping rates and policies) Love the size and portability of this machine. Being a single cylinder machine the recovery speed leaves a little to be desired but the quality appears to be top notch. Easy to use, seemed to work fast. only used it once so far. it's easy to use and it can save the earth. Product was as described.Work's good fair price. Disappointed with the time required to required to recover even a small system.

See and discover other items: a/c machineEdit ArticleHow to Recover Freon from an Air Conditioning Compressor "DISCLAIMER" (READ THIS FIRST!!!) The steps found in this article must only be performed by a licensed HVAC Technician. Please note that it is against EPA Regulations for anyone that HAS NOT obtained a Section 608 Type 1,2,3, or Universal License to; buy or work with any type of Refrigerant. If you are not Section 608 Certified, do that first before continuing any further! Locate the information panel of the unit you are working on and identify which type of refrigerant it uses. Be sure you know which one your unit use before proceeding. Hook up your gauges to the low side then the high side. Purge your hoses of any air that might have gotten inside so it. Hook up your yellow hose to the "IN" side of your recovery unit. Hook your extra yellow hose up to the "OUT" port of your recovery unit. Just like with your gauges you're going to want to purge your recovery unit as well so once you hook up the yellow hose just release some gas from the low side for 1 second.