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Jan 10th, 2023
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Hall of Fame  Lunker
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There is no optimum depth for an air lift. It's all about the requirements for the current task at hand. What you need!!!
Air lifts can be built and employed with unlimited head! Geyser pumps are more controllable tho. Let me restate that: For the aquaculture purposes I have in mind, and for the greatest efficiency -- after testing by those that have been experimenting with various diameter PVC and different sign air pumps -- 1.75 meters (65 inches) seems to be optimum. You can use all the air you want but there comes a point where you're using so much power you might as well go to a water pump. The thing I and others are trying to achieve is using the least amount of energy to move water around a system at the quantities we are interested in.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.
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Hall of Fame 2015 Lunker
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Hall of Fame 2015 Lunker
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Understand where you are coming from Cecil, but there is plenty engineering information on air lifts. Unfortunately, you have to pay for most of it.
Air lift's are not "new" and have been around for over 100 years. There are many industries, world wide, that use air lift's. Air lift's are the second most used type of pump in the Aquaculture industry. Sea water systems use air lift's because of the corrosive nature of sea water.
Pressure = Power. The deeper you go, the more power you'll need. You can almost 5X the flow of an air lift just by doubling the size of the pipe, whereas you would have to go 10X deeper with higher pressure to achieve the same flow in the smaller pipe.
I'm sure you'll figure out something, and am not knocking this in any way, just that I'll trust the engineering info.
Air lift's are not a one size fit's all type of device. Nice thing is they are cheap!!!
If you haven't connected the dot's, almost everything in the Aquaculture Industry comes from the water/waste water industry.
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Joined: Aug 2002
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Hall of Fame Lunker
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Understand where you are coming from Cecil, but there is plenty engineering information on air lifts. Unfortunately, you have to pay for most of it. Naah. No need to pay for it.  Don't need anything industrial scale. I'll try a couple of types of DIY manifolds and pressure chambers with different pipe sizes and use what works best for my application. I'm in the process of locating a tank I can do my testing in. Air lift's are not "new" and have been around for over 100 years. Try over 200 years; was invented by Carl Emmanuel Loscher in 1797. There are many industries, world wide, that use air lift's. Yeah I knew that too... Air lift's are the second most used type of pump in the Aquaculture industry. You couldn't prove that by me. I have yet to see a fresh water recirculating system that is run on air lifts and I've seen quite a few including multimillion dollar systems. But if you say so. Sea water systems use air lift's because of the corrosive nature of sea water. I guess I'm not aware of any sea water systems in Indiana. So there aren't water pumps that are made to withstand corrosion? Pressure = Power. The deeper you go, the more power you'll need. You can almost 5X the flow of an air lift just by doubling the size of the pipe, whereas you would have to go 10X deeper with higher pressure to achieve the same flow in the smaller pipe. Don't want to use more power; I want to use less. That's my main impetus for designing a system that runs on air lifts. And yes diameter of the pipe is one of the parameters, but remember I don't need industrial scale power at industrial scale power consumption. I'm sure you'll figure out something, and am not knocking this in any way, just that I'll trust the engineering info. I always do.  Air lift's are not a one size fit's all type of device. Nice thing is they are cheap!!! Nothing in this world is one size fits all. Nothing. If you haven't connected the dot's, almost everything in the Aquaculture Industry comes from the water/waste water industry. I knew that from my waste water class in fisheries science before you were born. Dude really? You didn't think I knew that? It's in all the recirculating texts. 
Last edited by Cecil Baird1; 01/04/14 11:49 PM.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.
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Joined: Dec 2009
Posts: 6,692
Hall of Fame 2015 Lunker
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Hall of Fame 2015 Lunker
Joined: Dec 2009
Posts: 6,692 |
Your funny 
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Hall of Fame Lunker
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You're funny I try to be. I'm also OCD when it comes to grammar, hence why I corrected your use of your ( sic) vs. you're. Sorry can't help myself!  My Ipad drives me crazy 'cause I don't notice typo errors until after I come back and read the thread again!
Last edited by Cecil Baird1; 01/05/14 11:44 AM.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.
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Joined: Dec 2009
Posts: 6,692
Hall of Fame 2015 Lunker
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Hall of Fame 2015 Lunker
Joined: Dec 2009
Posts: 6,692 |
Grammar police Yeah, you've mentioned a mental disorder on a few occasions. Everyone has their quirks
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Joined: Aug 2002
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Hall of Fame Lunker
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Hall of Fame Lunker
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Grammar police Yeah, you've mentioned a mental disorder on a few occasions. Everyone has their quirks That's for sure!  Hey you'll never guess what I'm writing about right now for our next aquaculture association newsletter.  Should I quote you on any of your posts?
Last edited by Cecil Baird1; 01/05/14 12:23 PM.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.
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Joined: Dec 2009
Posts: 6,692
Hall of Fame 2015 Lunker
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Hall of Fame 2015 Lunker
Joined: Dec 2009
Posts: 6,692 |
You can write anything you want!
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Joined: May 2011
Posts: 733
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Joined: May 2011
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Sorry it took so long. Here is the site to Sulzer's float triggers but I cant find a price. http://www.sulzer.com/en/Products-and-Se...Float-Switch-KSSimilar products that give lots of varying depth control run around $100 for dual float system. The top float starts it and the bottom float stops it.
Water is the basis of all life, by design!
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Joined: Aug 2002
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Hall of Fame Lunker
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OP
Hall of Fame Lunker
Joined: Aug 2002
Posts: 20,043 Likes: 1 |
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.
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Joined: Dec 2009
Posts: 6,692
Hall of Fame 2015 Lunker
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Hall of Fame 2015 Lunker
Joined: Dec 2009
Posts: 6,692 |
It's just a signaling device.
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Joined: Jan 2009
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Moderator Ambassador Field Correspondent Lunker
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Moderator Ambassador Field Correspondent Lunker
Joined: Jan 2009
Posts: 28,541 Likes: 845 |
dit-dot-dash?
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Joined: Dec 2009
Posts: 6,692
Hall of Fame 2015 Lunker
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Hall of Fame 2015 Lunker
Joined: Dec 2009
Posts: 6,692 |
29 bucks. Automation Direct  Esshup, those blue switches I gave you list at about 100.00 each for 1. I have about 25 more. What to do with all those dang level switches??? Have about 60 of the other ones, and I'll never use them 
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