venturi vac diy

[BORO]

I'm looking for pictures of your glass venturi that you vacuum outer sleeves with.

I know of one on the west coast I used , I don't think they are at the shop yet.

For those that don't understand, you put this glass venturi onto the tip of a hand torch, then open the oxygen. The oxygen flowing out of the torch creates vacuum via the venturi, creating negative pressure on the blow hose you connect to the third hole.


Anyone with a picture of their glass version would be excellent. Any discussion about hole sizes , or increased /decreased pressure by design is also welcome

I love my current tiny dust devil vac set up. Unfortunately its on the chopping block as I try to minimize what I carry in my car as I travel. Even tho a glass venturi may waste o2, its tiny size is perfect for the travel kit.

[BORO]

https://en.m.wikipedia.org/wiki/Venturi_effect


This wiki explanation has a picture of one. That one looks fragile by design. I know the one I used was some type of tube in a tube with a nipple on the side for the hose.

I know I could just try. I don't have time to r.n.d.

I don't need it to be pretty. I just need it to work well.

[Mute]

Rnd should be almost none existing, just make a constriction and add the vac hose there. Any flow through will create a vacuum. Great idea with using the o2 from hand torch

[swillz]

http://www.talkglass.com/forum/showthread.php?28626-Vacuum-stick-stack/page6&highlight=Steve+bates

Riley has a pic of one in this thread. Steve bates had a pic on the first page but unfortunately it’s unavailable. Hope this helps somewhat

[BORO]

Thanks guys.

I

[istandalone24/7]

that's a damn good idea!

[BORO]

Worked perfectly the first try. First one Fits a hornet tip, I may make a second one for my stock smith #7 (hope it flows enough)

I think the trick I a tiny tiny hole for the inner wall (third hole that sucks.

[Mute]

Pics or I'm calling B$

[Mike_Aurelius]

With the cost of oxygen...it sounds suspect.

There are easier ways, especially if you have an air compressor nearby: http://www.air-vac-store.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=AS&Category_Code=AVR

These work very well.

[Mute]

Mike, I think most know that.

Its about principalities

[istandalone24/7]

With the cost of oxygen...it sounds suspect.

There are easier ways, especially if you have an air compressor nearby: http://www.air-vac-store.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=AS&Category_Code=AVR

These work very well.

jeez, ya think? many people use either LOX or an HVLP system that would make this a non issue. although i do agree that if said person is using high pressure cylinders that cost $30-$70 a piece (airgas rapes us up here) this would be cost prohibitive.

[Mike_Aurelius]

Principalities???

[Mute]

91714

[Mike_Aurelius]

Definition of principality

plural principalities1a : the state, office, or authority of a prince (https://www.merriam-webster.com/dictionary/prince)
: the position or responsibilities of a principal (https://www.merriam-webster.com/dictionary/principal) (as of a school)
: the territory or jurisdiction of a prince : the country that gives title to a prince
3principalities plural : an order of angels — see celestial hierarchy (https://www.merriam-webster.com/dictionary/celestial%20hierarchy)

[Mute]

Watch the movie

[Mike_Aurelius]

jeez, ya think? many people use either LOX or an HVLP system that would make this a non issue. although i do agree that if said person is using high pressure cylinders that cost $30-$70 a piece (airgas rapes us up here) this would be cost prohibitive.

Even so, you are still throwing away oxygen, changing your flame chemistry, and affecting the heat base of your piece.

[Mute]

Watch the movie
91716

[Mute]

Even so, you are still throwing away oxygen, changing your flame chemistry, and affecting the heat base of your piece.

I don't think so Tim
91717

[istandalone24/7]

Even so, you are still throwing away oxygen, changing your flame chemistry, and affecting the heat base of your piece.

correct, this does "waste" oxygen. but if you don't have a vacuum, this is a band aid that will get you through the project. something that will work for the time being.

[Swim]

Even so, you are still throwing away oxygen, changing your flame chemistry, and affecting the heat base of your piece.

all of these are super minimal, forsure its not gonna do anything to the flame chemistry or up on the bench or you have other issues to address. I dont get any breathing with a handtorch on my main regulator

[raul24]

You could use water to pull a vacuum.

http://www.scilabware.com/Liquid-Handling/Pumps/Filter-pump/p-82-83-131/

[BORO]

It does not change the atmosphere or the chemistry.

Hantorch still on its stand , tip has a glass venturi on it, venturi hooked up to your blow hose. Blow hose connected to the outer sleeve your sleeving w. Your still melting the sleeve with your MAIN BENCH BURNER.

This phone wont edit or post pics, lets see if I can spice this thread up with a borrowed phone... Give me a few

[Swim]

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[Swim]

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[Swim]

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[Swim]

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[Swim]

these are the different versions that BoRo has used, he needed me to post the pics for him, but if they are in the correct order, the first one is the one he used in utah made by someone else and the next three are the ones he has made since in order to the most recent. enjoy

[BORO]

They all were from two days ago.

Swim and I talked about the one in utah... But I still don't have a picture of it.

The ones sim posted are out of order, it was ugly to pretty. The last blue one sucks the most.

[Swim]

eah, not surprised they got shuffled, glad you can see them

[BORO]

Thanks Swim.

+1

[BORO]

The final blue one is 12.5mm over 9.5mm with a 10mm joint for the hose to fit over. The hole on the inside piece of 9.5 is tiny. I pushed the hole with a Remer tip like a micro bowl push. This insured the smallest constriction inside the 9.5 tube was right on the hole. The hole is about 1/3rd the size of a standard bowl bottom hole.