Looking for a type of valve...

Hi,

I'm looking for a valve that is ring shaped and about 4-6 inches across if I remember correctly. One face of it is flat and tapered at a slant and has a bunch of little holes in it. I was told that CO2 is pumped through it at high pressure creating a vacuum behind it to remove gasses that accidentally get released in chemical plants. Can anyone tell me what such valves are called, and possibly where they can be obtained?

Thanks for any help!
David

 

[bimr]

Are you thinking of an ejector?

http://www.processregister.com/Croll_Reynolds_Co_Inc/Supplier/sid3132.htm

 

>bimr (Civil/Environmental) 20 Jun 12 23:27
>
>Are you thinking of an ejector?
>
>

http://www.processregister.com/Croll_Reynolds_Co_I...

I don't believe so. In this photo:

http://is.gd/YFdohj

the valve itself is at the bottom of the discharge tube, where the CO2 line is attached right by the cut-off valve, so you can about how big it is. They make smaller valves too and people build smaller confetti cannons with them as well. The smaller size is more what we need. At this point I'd be deligthted just to find out what the things are called....

 

[ash9144]

You are looking for a venturi tube (same as ejector).

 

[bimr]

Master Blasters

http://www.confetticreations.co.uk/cannons.html

What does it have to do with "remove gasses that accidentally get released in chemical plants."?

 

[bimr]

Here is a better description:

http://www.confettimaster.com/confetti.equipment.cannons.blasters.html

http://www.airblast.com/Airblast Venturi Air Blowers.pdf

Actual venturi:

http://www.airblast.com/AB Venturis.pdf

 

>bimr (Civil/Environmental) 21 Jun 12 16:00
. . .
>

http://www.airblast.com/Airblast Venturi Air%2...

>
>Actual venturi:
>
>

http://www.airblast.com/AB Venturis.pdf

Thank you! The first example looks similar to what I'm after. Do you know of any that will handle higher pressure from CO2 tanks?

 

>bimr (Civil/Environmental) 21 Jun 12 15:32
>Master Blasters
>
>

http://www.confetticreations.co.uk/cannons.html

>
>What does it have to do with "remove gasses
>that accidentally get released in chemical
>plants."?

I was told that's what they are mainly used for, so that's what I thought. Aren't they? Doing a search for venturi tube ejectors I still haven't been able to find any. Where to look other than the links people here provided?

 

[bimr]

They are used for clearing air from tanks or rooms before someone is able to work in the areas.

http://lmgtfy.com/?q=venturi+air+blowers

 

>bimr (Civil/Environmental) 21 Jun 12 17:40

>They are used for clearing air from tanks or rooms before
>someone is able to work in the areas.
>
>

http://lmgtfy.com/?q=venturi+air+blowers

Thank you for that! Know what to call them, now it's a lot easier to find them. Do you know if there might be used ones available any place?

 

[bimr]

Try craigslist, ebay, or a used equipment dealer.