Couple (infinity) jet questions???

[gautman]

the anular space in this video is 1/16 inch on a 3" OD for a surface area of 0.450996 in/2. a typical vacuum jet for 3 inch is a 3/4 jet (0.4418 in/2) and he said his pump was 2 inch at 185 gpm and ran it at 1/4 to 1/2 throttle, more throttle did nothing
so the numbers between the 2 different jets is about the same but hes at half throttle
a 2 inch is typically a 1/2" jet (0.196 in/2)
2" anular surface area is .3 in/2
2-1/2" anular surface area is .362 in/2
looking at the numbers it seems like a 1.5" pump might do it upto a 2.5" nozzle
i just dont like the thought having to screen the intake of the pump down to 1/16" so the anular space doesnt get plugged up with anything larger than 1/16" passing through the pump

 

[Jomsa]

Here is bunch of videos about my Infinity jet : Playlist on Youtube about Infinity jet dredging

 

[gautman]

Here is bunch of videos about my Infinity jet : Playlist on Youtube about Infinity jet dredging

your cone seems to be sloped on almost a 45 degree angle?
did you use an anular space or did you use 1/4" holes?
If anular what gap did you use? was it equivalent to a 3/4" jet?

 

[Jomsa]

your cone seems to be sloped on almost a 45 degree angle?
did you use an anular space or did you use 1/4" holes?
If anular what gap did you use? was it equivalent to a 3/4" jet?

Cone is i believe actually 22 degree angle. Too steep imho still. The area of the gap was measured to be same as the throat to pipe ratio of 3" powerjet. Cant remember the dimensios anymore though. Might have notes about it somewhere, but tehre is basicly 1-2mm gap between the shell and the cone if i remember correctly.

edit :
Actually found a screen capture of the CAD file. Been years since i made that, but i can see many errors in its design now. Should make new one i guess.

 

[gautman]

Cone is i believe actually 22 degree angle. Too steep imho still. The area of the gap was measured to be same as the throat to pipe ratio of 3" powerjet. Cant remember the dimensios anymore though. Might have notes about it somewhere, but tehre is basicly 1-2mm gap between the shell and the cone if i remember correctly.

edit :
Actually found a screen capture of the CAD file. Been years since i made that, but i can see many errors in its design now. Should make new one i guess.
View attachment 2219768

 

[gautman]

thank-you very much for that cad drawing, what Country are you from? Thats some pretty tough luck to have your pump go down when no gold is coming in.

 

[Jomsa]

thank-you very much for that cad drawing, what Country are you from? Thats some pretty tough luck to have your pump go down when no gold is coming in.

Finland. Luckily i am mostly just hobbyist with some tourism and youtube as a side income (from gold) ... Yeah the pump blew real good, but that was 2 years ago. This summer i got a new one and managed to dredge a bit, but not much. Gold has been really thin past few years.

 

[gautman]

keene did a test

 

[gautman]

if you are looking for tapered cones, they have exhaust cones on amazon

https://www.amazon.ca/Motoforti-Mandrel-Exhaust-Concentric-Stainless/dp/B0DS2KMQQQ/?tag=treasurenet01-20