[AT] OT--foam marker for sprayers

[charlie hill]

John that link didn't load right.  Search the site for "foam markers"

Charlie

-----Original Message----- 
From: charlie hill
Sent: Saturday, January 10, 2015 1:40 PM
To: Antique tractor email discussion group
Subject: Re: [AT] OT--foam marker for sprayers

John,  solenoids might not be as expensive as you think.
http://mower-blades.agrisupply.com/search#w=foam%20marker&asug=
also, looking at the pictures it seems to me like all you need to make one
is the foam solution and the drop down leg applicators along with a
12 gal, 12 V spot sprayer and some hose.

C

-----Original Message----- 
From: jtchall at nc.rr.com
Sent: Saturday, January 10, 2015 8:07 AM
To: Antique tractor email discussion group
Subject: [AT] OT--foam marker for sprayers

COMPLETELY OT POST

I know some of you farm full time. How does a foam marker system for a
sprayer make foam? From what I can tell looking around on the net the air
and liquid foam solution are fed in 2 separate lines to the end of the boom
where they mix in some sort of small chamber before being discharged. How
does the mixing chamber work? Is the liquid solution fed under pressure from
the tank?

I’ve read up on the homemade systems that generate the foam in the tank and
have constructed a prototype of that. Unfortunately it appears I have to use
rather large pipe to be able to push the foam down the pipe. With long
enough hose, you actually build back pressure on the tank using something
small like sprayer line. My prototype uses 1 1/2” PVC pipe. Works very well
but takes a long time to generate enough foam to start dripping. I also have
a concern of how I will switch from one boom to the other. Small solenoids
aren’t cheap, I haven’t priced the size I would need. I’ve considered using
2 tanks and 2 compressors, would be a lot cheaper than solenoids. To keep
from having to wait on the foam due to switching from one tank to the other
I could let both run all the time. Another reason I dislike this system is
the water in the tank tends to slosh up on the foam, meaning I would need a
baffle of some sort in the tank.

Any help is appreciated.

John Hall
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