I inherited a spray rig and I'm trying to refurbish. It has an old pto roller type pump and I was wondering if it need a pop off or recirculating valve, when I'm not spraying. Also will I need a pressure regulator? Does any one have a piping diagram? Any sites to buy parts I might need (strainer, valves, regulator etc.)
roller pump
- Thread starter sparkyjc
- Start date
Bird
Epic Contributor
Yes, mine had an adjustable pressure regulator with what I called a bypass (maybe the same thing you're calling a recirculating valve? since I'm not sure what the correct terminology is
) but it allowed the excess pressure to return to the tank, which also served the purpose of keeping the material in the tank stirred..
) but it allowed the excess pressure to return to the tank, which also served the purpose of keeping the material in the tank stirred..
jayste
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http://www.tractorbynet.com/forums/build-yourself/97464-3-point-boom-sprayer-thanks.html
Above is a link to a thread that is one of the best homebuilt sprayers I've seen. This guy did a top notch job. It should have most of the information you're asking about.
Good luck.
Above is a link to a thread that is one of the best homebuilt sprayers I've seen. This guy did a top notch job. It should have most of the information you're asking about.
Good luck.
JerryG
Super Member
Make sure you can get it to roll before you spend money on it. I have seen roller pumps stuck so bad that the housing would break before you could get them broke loose.
Bird
Epic Contributor
Yep, when I first got my spray rig, it had been sitting, unused for quite some time and the pump was seized, so I bought a new pump. I later learned that I should not have bought a new pump; I should have just disassembled the old one and cleaned the corrosion thoroughly in the glass bead blaster cabinet, which I had to do later to the second pump. Then I solved the problem (believe I learned here on TBN) by keeping it full of Prestone antifreeze when not in use.
jenkinsph
Super Star Member
I used to have a spray rig with a roller pump (Hypro 7 roller I think?) they work well and can develop about 300 psi pressure. Be sure that you get an adjustable regulator with a wide range of pressure if you are setting up small mister nozzles as these require a high pressure to work right. If you are spraying a stream with a gun or wand you can use a much lower pressure around 50 psi. If all you are going to do is use a spray wand you might consider an rv type water puimp that runs on 12 volts and has an automatic pressure switch and regulator built in, about $100 or less. this should be good for a smaller 50 gallon rig for homeowners.
Steve
Steve
Stampeder
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What Bird said......do it.
I am now working on a second sprayer. First was using an old hydraulic pump...totally siezed. Kept in submerged in WD40 for two weeks. Slowly wiggle it and it eventually turned. Then I disassemled it, cleaned it up...now works like a charm.
Another neighbour gave me a complete sprayer that has been sitting for about three years. Totally siezed. It' sitting in WD40 right now. I know I can recover it too.
Then I will fill it with Prestone when not in use.
BTW I keep a couple of gallons of WD40 around just for soaking and recovering things. It really helps.
Good luck on your sprayer.
Glenn.
I am now working on a second sprayer. First was using an old hydraulic pump...totally siezed. Kept in submerged in WD40 for two weeks. Slowly wiggle it and it eventually turned. Then I disassemled it, cleaned it up...now works like a charm.
Another neighbour gave me a complete sprayer that has been sitting for about three years. Totally siezed. It' sitting in WD40 right now. I know I can recover it too.
Then I will fill it with Prestone when not in use.
BTW I keep a couple of gallons of WD40 around just for soaking and recovering things. It really helps.
Good luck on your sprayer.
Glenn.