[AT] OT--foam marker for sprayers

Steve W. swilliams268 at frontier.com
Sun Jan 11 21:04:42 PST 2015


jtchall at nc.rr.com wrote:
> Thanks for all the replies!
> 
> Greg, was the mixing chamber located at the end of the boom? From what I can 
> tell it appears the markers for ag sprayers generate the foam at the end of 
> the boom. I found out a today a friend has one of these on his sprayer, I'm 
> going to try to go look at it next Sat. He said his gravity flowed the foam 
> solution? I'm determined to figure this out! I may wind up just buying the 
> end units with a mixing chamber. If I didn't need to spend money elsewhere, 
> I'd love to just buy a light bar, those things are sweet!
> 
> 
> Len, the plans you see on line are pretty much what I'm doing. It works 
> pretty good if you use a large enough hose. Too small of hose and you can 
> build up enough pressure to explode something, one guy did rupture his tank. 
> I've noticed some of the "store-bought" models even have a pop off valve 
> like a compressor. I did pick up an aquarium stone yesterday to see if it 
> would help make foam faster. There is another one on-line that the guy used 
> a 5 gallon bucket. He had to screw the lid on. He used a really short hose 
> since he was only marking the tractors center. Used the top of a soda bottle 
> for an accumulator.
> 
> Farmer, I played around trying to make a manifold with a screen for a few 
> minutes yesterday. Its not working yet, need to rethink how I set it up.
> 
> John
> 

You might want to look at the foam nozzles we use in the fire service. 
We use a small air aspirating inductor nozzle on the small water can 
style extinguishers. Same type of nozzle is used on indian tank style 
units. No air required just the foam concentrate and water.
Like this one.

http://www.wildlandwarehouse.com/wwcatalog/Indian_Air_Aspirating_Foam_Noz_P23142C589.cfm

Inside it's 1/4" tubing with 4 rows of 1/32" or so holes drilled at a 
compound angle. Looks like 45 degrees inline with the flow and 10-15 
degrees offset. One ring goes clockwise the next counterclockwise. At 
the attachment end there is an 7 hole "jet" with external threads. Looks 
a LOT like a lincoln cutting torch tip without the collar.

The nozzle slides into a threaded sleeve with a 1/4" hole in the 
outside. The hole is the on/off switch as well. Cover it = no foam.

These screw on in place of the normal nozzles.


This is another style. These are normally larger items that fit on 1.5" 
nozzles. You turn the nozzle to the fog setting to use them. (Think of a 
garden hose nozzle when you turn it to a wide fan spray)

http://www.firepenny.com/v/vspfiles/photos/MD-MADDDOG-3.jpg

They generate a LOT of foam.


-- 
Steve W.



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