air-tank hill fire pump

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Posts: 1
Joined: 01 Jun 2021, 17:18

air-tank hill fire pump

Post by peatstack »

I have an application for this airlift pump. I am in the scottish highlands where hill fires are common near bodies of water, yet the water is not usable in fire fighting because it can't be pumped away from a road. I imagine an airlift pump driven by a scuba tank source of pressurized air. I as one man could take this fire fighting kit out and be able to fill a small fire hose with water from any nearby water source without any setup time or power... a hose, a venturii airlift dirty water pump maybe 3d printed to be light and use a standard air hose connector. The heaviest part of this has got to be the air tank, next the hose and the pump i expect could actually be quite light.

With the right floats, maybe the scuba tank teathered to form a ballast for shallow ponds... ? Can you give me any advise on how to build such a thing?
as i don't think my need to fight fires near farm ponds without power exists many places.
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Joined: 11 Dec 2015, 00:12
Location: The Netherlands

Re: air-tank hill fire pump

Post by Pssymon »

Good day,

I have to say, I loved this idea, very unique.
I don't know if it would be possible though. The amount of pressure you will generate with an airlift is usually limited. You will have significant discharge head as well. If you would try this you would have to build a small diameter airlift, possibly only 20-30mm. Smaller diameters seem to be able to overcome higher discharge head more easily at the cost of total flow.

The real problem though, is that you will probably not have much pressure. The scuba tank idea is a good way to get around the need for electricity. The way the pressure is delivered to the airlift will probably be different compared to an air pump, I can't really give any predictions on how that will go. Perhaps the pressure will be much higher for a short time, compared to air pumps, which could make this more feasible.

I would suggest to just try it with the standard airlift model we use with a pressure chamber, but build that at a diameter of 20 or 30mm.
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