Vacuum Venturi Generators
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Senior User
Joined: Jan 2001
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Vacuum Venturi Generators
Many of us have compressors to create air pressure. I work on industrial systems that need vacuum. We use venturis to convert air pressure to vacuum. The parts are simple, no moving parts and small. Does anyone know of a supplier for these. I can think of many uses for one of these devices in the shop. Power brake bleeder, sucking fluid out of diffs, or other places.
Problem is I don't know who my company uses as a supplier and since I don't want to lose my job by trying to inappropriately aquire one from stores, does anyone know of a supplier for these things?
Problem is I don't know who my company uses as a supplier and since I don't want to lose my job by trying to inappropriately aquire one from stores, does anyone know of a supplier for these things?
Junior User
Joined: Jan 2002
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From: Blythewood, SC
Vacuum Venturi Generators
I've seen J.C. Whitney offer a simple Venturi as an alternative to a vacuum pump for air conditioning work. It's designed to be run off of shop-air and I think was around $60.
Bruce in South Carolina
1977 F-100 Ranger XLT
1984 Volvo 245 Turbo - it's a Ford now!
Bruce in South Carolina
1977 F-100 Ranger XLT
1984 Volvo 245 Turbo - it's a Ford now!
Postmaster
Joined: Apr 2001
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Vacuum Venturi Generators
Harbour Freight has one for evacuating A/C systems for around $9.00; works surprisingly well. Only downside was buying another $9 worth of fittings to rig it up for A/C, otherwise it would be ideal for your situations.
Freshman User
Joined: Jul 2002
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From: St. Charles, MO USA
Vacuum Venturi Generators
From my experience, these types of vacuum system are prolific users of compressed air. It would probably pay to make sure that your compressor can handle virtually continous use, or you have a very large tank that will allow for decent air capacity.
Just something to think about. For my perosnal use, I have several low to very high vacuum pumps that I was able to acquire through surplus outlets severla years ago. Something to perhaps search out on the net.
Regards,
Klaus
Just something to think about. For my perosnal use, I have several low to very high vacuum pumps that I was able to acquire through surplus outlets severla years ago. Something to perhaps search out on the net.
Regards,
Klaus
Posting Guru
Joined: Mar 2002
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From: Yelm Washington usa
Vacuum Venturi Generators
I have an old style a/c compressor and I was told by several different people that it can be used as an air compressor. What I am wondering is if I can use it as a vacuume pump?
thank you,
dj
thank you,
dj
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Posting Legend
Joined: Sep 2001
Posts: 30,255
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Vacuum Venturi Generators
An old York type AC compressor can be used to pull a vacuum. I have never been able to pull enough vacuum to evacuate an AC system with mine. My compressor has been used as an air compressor for many years and a vacuum pump several times.
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From: Yelm Washington usa
Vacuum Venturi Generators
thank you Eric
I have the York compressor got it from the local wrecker for $20.00. It is off of a cold delivery van. system still had a charge when I pulled it off. Plan to put it on the next project
dj
I have the York compressor got it from the local wrecker for $20.00. It is off of a cold delivery van. system still had a charge when I pulled it off. Plan to put it on the next project
dj
Posting Legend
Joined: Sep 2001
Posts: 30,255
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Vacuum Venturi Generators
dj-
Just remember to drain the refer oil out of it, clean it out real well with solvent, and refill with a little compressor oil.
My unit is still in service, 20+ years now. I use it for air in my basement shop. When I need air the motor runs contiually and the only pressure control is a relief valve set at 110 psi. It is not suitable for continuous operation with only a relief valve. It also wastes energy, but it was a simple setup for an occasional use to inflate a car/bike tire, or B-Ball for the kids.
I have a second unit sitting on the shelf, salvaged from a car, waiting to go on my F250 project. I plan to use a pressure control to activate the compressor clutch this time. With a 400 to turn it over I don't think I will need a pressure unloader. I will be using a check valve on the output side and a tube to my air cleaner for the inlet. The only fun will be coming up with mounting brackets and belts since I have an AC unit also.
Just remember to drain the refer oil out of it, clean it out real well with solvent, and refill with a little compressor oil.
My unit is still in service, 20+ years now. I use it for air in my basement shop. When I need air the motor runs contiually and the only pressure control is a relief valve set at 110 psi. It is not suitable for continuous operation with only a relief valve. It also wastes energy, but it was a simple setup for an occasional use to inflate a car/bike tire, or B-Ball for the kids.
I have a second unit sitting on the shelf, salvaged from a car, waiting to go on my F250 project. I plan to use a pressure control to activate the compressor clutch this time. With a 400 to turn it over I don't think I will need a pressure unloader. I will be using a check valve on the output side and a tube to my air cleaner for the inlet. The only fun will be coming up with mounting brackets and belts since I have an AC unit also.
Senior User
Joined: Apr 2002
Posts: 467
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From: WEEDSPORT NY
Vacuum Venturi Generators
Check out: www.royalprod.com I have used their "pneuvac" unit that screws into a 55 gallon drum for about 9 years. No moving parts to wear out is a wonderful thing. There are other manufacturers out their but I feel Royal has a superior product. You can also look at www.guardaircorp.com & www.jamesmorton.com
Posting Guru
Joined: Mar 2002
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From: Yelm Washington usa
Vacuum Venturi Generators
Eric,
I have a dual point pressure switch for a well that will work great and is easily adjustable to use to start and stop it. I like the idea of going to the air cleaner for the intake air. thank you for the tip on the oil, I had forgotten about that.
dj
I have a dual point pressure switch for a well that will work great and is easily adjustable to use to start and stop it. I like the idea of going to the air cleaner for the intake air. thank you for the tip on the oil, I had forgotten about that.
dj
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Joined: Jun 2001
Posts: 1,236
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From: Vancouver Island
Vacuum Venturi Generators
I've heard that refrigerator compressors can be used as vacuum pumps. Here's a couple of pages with info:
http://www.biopatent.com/ac.html
http://yarchive.net/ac/diy_ac_pump.html
http://surfing.rdx.net/Building/pump.html
http://www.biopatent.com/ac.html
http://yarchive.net/ac/diy_ac_pump.html
http://surfing.rdx.net/Building/pump.html