It would depend on the flow through each side. If there was no flow on
either side, they would both see 150 PSI. If there is flow, then it
would depend on the size of the opening(s), and the amount of flow that
the compressor can provide.
bp
<part15sbs{at}gmail{dot}com>
On 5/23/2023 10:45 AM, Steve Jones wrote:
I dont know the math behind air pressure, but if I split the 150psi
into two, then does each orifice get 75psi?
On Tue, May 23, 2023 at 9:54 AM Chuck McCown via AF <af@af.afmug.com>
wrote:
Spoke to a venturi engineer just now. He says 72 psi is the magic
number. It has something to do with atmospheric air pressure and
the density of the air. I presume that number would change with
altitude.
*From:* Steve Jones
*Sent:* Monday, May 22, 2023 9:34 AM
*To:* AnimalFarm Microwave Users Group
*Subject:* Re: [AFMUG] Air vac
I use an auger to dig them, vac to clear them. Same thing with the
airspade/airvac combo. I dont do posts less than 48 inches. Whats
really pushing this is the last project was installing 2 inch duct
for the power company, the old primaries were failed concentric,
as it turns out the stuff is dangerous, it faults on its own,
jabbing shovels and post hole diggers at it is a recipe for
disaster and water is its mortal enemy. Im chasing more contracts
with that power company to replace more of that concentric. Im not
gonna get the cutting power of water, but ill have dry spoils to
put back in the hole.
I wish I hadnt done all the drugs, id be able to understand the
maths on this, im wondering if I cant split the input and double
the lift with two venturis
On Mon, May 22, 2023 at 9:23 AM <dmmoff...@gmail.com> wrote:
So you dug post holes with a shop vac? Is it sandy where you
are? I feel like I hit about 10,000 rocks per post hole.
Many too big for a vac hose, and many just big enough to clog it.
I might have to try it anyway.
*From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Steve Jones
*Sent:* Sunday, May 21, 2023 6:12 PM
*To:* AnimalFarm Microwave Users Group <af@af.afmug.com>
*Subject:* Re: [AFMUG] Air vac
I'm having better luck with the prototype than a shop vac
already, just trying to improve the lift. Toting a generator
isnt really an option.
I also just have a shop vac hose, if theres moisture the dirt
collects on the sides with a shop vac and loses lift. That's
how I've always dug post holes.
On Sun, May 21, 2023, 3:53 PM Chuck McCown via AF
<af@af.afmug.com> wrote:
I think you would have better luck with a strong shop vac
and a 30 gallon drum. I have seen guys do that and it
worked OK. Air powered vacuum producers work but I don’t
know how well. Sometimes they are called eductors or
ejectors.
Take a look at this one:
https://www.globalindustrial.com/p/2-in-line-vac-only-aluminum?infoParam.campaignId=T9F&gclid=CjwKCAjwgqejBhBAEiwAuWHioM68tuz0PVLcvHFy4CRspRtvhy5gEQQryMrUkOoNv4MVeUTRSWTkvxoCrv8QAvD_BwE
<https://www.globalindustrial.com/p/2-in-line-vac-only-aluminum?infoParam.campaignId=T9F&gclid=CjwKCAjwgqejBhBAEiwAuWHioM68tuz0PVLcvHFy4CRspRtvhy5gEQQryMrUkOoNv4MVeUTRSWTkvxoCrv8QAvD_BwE>
Best Regards,
Chuck McCown
McCown Technology Corporation
8401 N Commerce Dr
Lake Point, Utah 84074
801-250-9503 Office
435-830-4306 Cell
www.mccowntech.com <http://www.mccowntech.com>
www.microtrench.pro <http://www.microtrench.pro>
www.terabitnetworks.com <http://www.terabitnetworks.com>
*From:*Steve Jones
*Sent:*Sunday, May 21, 2023 11:56 AM
*To:*AnimalFarm Microwave Users Group
*Subject:*[AFMUG] Air vac
I need advice from you nerds.
I'm a broke joke, so hydrovac isnt in my budget. Besides,
I want dry spoils to put back in the hole.
This revision works for venturi. I have multiple size
reducer but right now I'm just doing 3/4 to to inch. The
3/4 to 1 then 1 to half back to 1.5 for the venturi side
seemed to have the best lift, but the hardware store didnt
have everything, so it's all in 2 inch right now
I'll dump to a 2000lb peanut sack if I can find one, but
for now I'll just use a 30 gallon drum and dump on the
mega movers.
This is for use in conjunction with the airspade I did
have some coin to get.
Venturi math gets complicated and I'm full retard so I
need to find he best ways to increase negative pressure
and where to drill the ports.
I also wonder if theres an option to recapture the exhaust
into the airspade.
I need you nerds to go full geek.
If I can get valves correct I'll have the local machinist
make me a couple that are pressure rated.
This is to mimic the airvac I also cant afford.
This proof of concept has the lift to clear potholes and
handholes, but I need to clean it up and get more
efficiency.
A side discovery is that this setup is perfect for blowing
straw and seed with glue
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