FUME HOOD TIPS

[isaiahw250]

For starters, where do we start for fume hoods? What would be a starter setup?

Is 195 CFM enough for nitric acid?

 

[Master Nater]

cubic foot per minute necessary would depend upon how many cubic foot you have in your fume hood and what kind of flow you will need. i believe you need to pay attention to how many times you need to displace your entire fume hood, as in total cubic foot displacement over how many times per minute. but you'd better ask the commercial guys how man times they engineer their systems by.

if i had to guess, i'd say you need to displace all the air in your hood at least every 10 seconds. so your cubic feet per minute would be your fume hoods cubic feet x 6. but that's just a guess. if you are running a highly vaporous reaction, one can always close up one of the sides of the face, to make air flow inside the hood towards your needs. by this, i mean closing up the left side door, and placing your reactions on the right side. this would move more air across your reactions.

hope this helps. Good luck and happy refining.

 

[isaiahw250]

cubic foot per minute necessary would depend upon how many cubic foot you have in your fume hood and what kind of flow you will need. i believe you need to pay attention to how many times you need to displace your entire fume hood, as in total cubic foot displacement over how many times per minute. but you'd better ask the commercial guys how man times they engineer their systems by.

if i had to guess, i'd say you need to displace all the air in your hood at least every 10 seconds. so your cubic feet per minute would be your fume hoods cubic feet x 6. but that's just a guess. if you are running a highly vaporous reaction, one can always close up one of the sides of the face, to make air flow inside the hood towards your needs. by this, i mean closing up the left side door, and placing your reactions on the right side. this would move more air across your reactions.

hope this helps. Good luck and happy refining.

Thanks for the knowledge

 

[Yggdrasil]

For starters, where do we start for fume hoods? What would be a starter setup?

Is 195 CFM enough for nitric acid?

There are two ongoinging threads on this topic just now.
Read them as starters.

 

[isaiahw250]

There are two ongoinging threads on this topic just now.
Read them as starters.

Can you link me to it

 

[Yggdrasil]

Can you link me to it

Just out of curiosity, how do you read the forum?
Do you search at all?
How about searching for what you need?
We have a section about building your own equipment.
https://goldrefiningforum.com/forums/building-your-own-equipment.111/

 

[Yggdrasil]

Can you link me to it

A simple search of the forum gave me this:
https://goldrefiningforum.com/search/106359/?q=hood&o=relevance

 

[isaiahw250]

It’s called a “refresher”. There’s more ppl on this site now so I’m kinda re-asking for more and updated responses

 

[Yggdrasil]

It’s called a “refresher”. There’s more ppl on this site now so I’m kinda re-asking for more and updated responses

Yes and we expect people (not ppl) to do their own research.
There are several reasons for that, among others is that the research you do yourself leads to more and deeper learning and another is that we simply do not have the time to hold hands with all the newcomers in here.

 

[Martijn]

For starters, where do we start for fume hoods? What would be a starter setup?

Is 195 CFM enough for nitric acid?

It all depends on your situation. Amounts of material to process vs the time you want to do it in.
You're not pumping out liquid nitric I hope , but NOx gases, which you can minimize by covering the beaker with a watchglass and not creating a BFRC ( big freakin red cloud of NOx) by limiting the amount of oxidizer(HNO3) in your process.

 

[4metals]

A more targeted search can be found HERE