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Tool Talk Discussion Forum

Building a vacuum pump?? Can ya do it?

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kippster

02-12-2008 14:48:30




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Hey guys, I milk a few (like 4) cows, for our family's use and to keep myself out of trouble. I run my Surge belly milker off the power brake hose on my truck or the little hole in the side of the manifold on my tractor. This works good, but I would really like to find or maybe build an electric pump to use on 110 current. Any of you guys ever build one? It don't have to be big, just enough to run two belly milkers.

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Bob Huntress

02-13-2008 20:30:05




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 Re: Building a vacuum pump?? Can ya do it? in reply to kippster, 02-12-2008 14:48:30  
As Greg pointed out, you can use any old compressor, and I hope this is not seen as disagreeing with him. His plan is workable, and there is nothing wrong with it. I would like to mention that when the law requiring that refrigerants be recovered was first an issue, many technicians made their own recovery units, until 1993, and found that using an older, non hermetic refrigeration compressor produced a better vacum for recovering freon. I prefer using a small open type refrigeration compressor for building a vacum pump. That is just my opinion, and Greg's plan is still a fine way to create a usable suction.

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Slowpoke

02-24-2008 00:31:41




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 Re: Building a vacuum pump?? Can ya do it? in reply to Bob Huntress, 02-13-2008 20:30:05  
What's the difference between a non hermetic compressor and an open type compressor? I have several refrigerators from the 70s. How can I tell which type of compressor I have?
Thanks



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Greg CO

02-13-2008 09:36:55




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 Re: Building a vacuum pump?? Can ya do it? in reply to kippster, 02-12-2008 14:48:30  
You can use an old 1hp air compressor that has the pump mounted on say a 20 gallon tank. You would just plumb suction side of the compressor to the tank and let the pressure side be the exhaust. Hamby Dairy supply has a neat little vacuum regulator for about $20 or $30 that can be put anywhere on the suction side of the system so you don’t pull too much vacuum. We set ours at 11 inches.

Happy milking

Greg

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Rayy

02-12-2008 17:45:00




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 Re: Building a vacuum pump?? Can ya do it? in reply to kippster, 02-12-2008 14:48:30  
I dont milk cows with mine, but I use it to vacume down car A/c systems. I took a old compressor out of a old window (house) air conditioner and it gets the vacume down to about 15 - 20 pounds of vacume. I junked the rest and just kept the control panel and the compressor. Works great and I have run it for hours on end using it. Dont know if it would work for your application, but give it a try.

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ArleninOr

02-12-2008 15:39:43




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 Re: Building a vacuum pump?? Can ya do it? in reply to kippster, 02-12-2008 14:48:30  
Kippster,would you belive it, I have one of the old surge vaccum pumps in the barn.Probably too far to ship but if you was close we could talk about it



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kippster

02-13-2008 17:03:56




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 Re: Building a vacuum pump?? Can ya do it? in reply to ArleninOr, 02-12-2008 15:39:43  
Where might you be Arlenin? I might just be interested in your pump. Let me know, or drop me an email.



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BLinWMi

02-12-2008 15:24:00




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 Re: Building a vacuum pump?? Can ya do it? in reply to kippster, 02-12-2008 14:48:30  
I do exactly what you are wanting to do, except I only have one cow. You will want to find either one of the old Surge piston pumps or an old vane pump. You will not be able to use one of the new fangled diaphram pumps if you are going to keep using 2 buckets. With Surge buckets your pump has to create at least 10 cfm, fifteen would be better. And it has to maintain that vacuum at 13.5 inches of mercury. You do not realy need a balance tank with surge buckets because of the large reserve the milker holds right at teat level. If you can find an old surge piston pump, most times they do have a balance tank the pump is mounted to. I use an old Deleval vane pump that my grandpa milked with for 50 years. It has metal vanes instead of plastic so it lasts forever. He used to run 3 buckets with it and had no vacuum stability. I had it tested by MMPA and it was only making 11 cfm, so I replaced it with a surge 100+ in the tie stall barn. I use the little old Deleval at home for my one cow and bucket. So ya, what you want to do is real easy, just don't plan on using one of the new pumps people sell online. Get a good old used one off ebay or maybe an old dairy neighbor. Let us know how it works out for ya.

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Jon Hagen

02-12-2008 15:08:44




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 Re: Building a vacuum pump?? Can ya do it? in reply to kippster, 02-12-2008 14:48:30  
Used milker vacuum pumps are/were a dime a dozen when most area farmers quit milking in my area.
Either piston or vane pumps were sold by the thousands for scrap. The vane pumps do a better job and are more reliable IMO. For your needs a 1 hp pump should do the job, also make sure you have a good working vacuum regulator and vacuum tank in the system, as too much or unstable vacuum is hard on the critters.
Not really sure what you could adapt to be a vacuum pump, you need high volume and low pressure.

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