if the wording is wrong, then the meaning is up for debate. there is no room for error here. so making sure the language being used is on point is important.
pouring…into jars or onto paper. 5 grams from your “mother oil” onto parchment before any post processing. or 200mls into a canning jar. use the tools you have to make all the things before you try and modify your tooling because you’ve read that you need to run at -80C and use N2. become proficient in that which is infront of you. So you can more easily see how it might be done better.
you’re absolutely correct that to run below the boiling point of propane -42C (which is sub -40C) you will need some way to supplement the pressure differential. sucking from the other end works. depending on which pump(s) you have.
the MEP used to come with haskels, and the two stage versions will pull a decent vacuum. not sure what they ship with these days.
if you use N2 ONLY to push from your chilled solvent tank, then purging is simple. simply vent after you’ve injected. Understand that the vacuum in your solvent tank is now gone (there are ways around that). if you want to push from your columns into your evaporator, you now have a problem. How do you vent from a hot evaporator? Maybe don’t heat it until you’ve vented? except the heat transfer fluid in your jacket will freeze if you do that…(been there, done that). so now you have to push it back into your solvent tank along with the solvent…and get everything below -42C before you can safely vent. which is more work for your pumps. it can and is done. it’s not necessarily as much fun as you imagine it to be.
Out of curiosity, does anyone know the name or part number that this stainless steel fitting with this little green plastic adapter to connector lines for the pre and post condensing coils called? trying to replace some parts on an old used machine having a difficult time tracking em down , here a picture for reference thanks everyone
I was just thinking that I think I just found it online but the temperature rating is what honestly keeping me away and I heard they will leak like a mofo
Looks like a push to connect air line fitting commonly used in heavy truck brake and suspension systems. They look and function like shark bite fittings and while convenient for connecting and disconnecting, they are prone to leaking.
Past -10° these will Leake almost guaranteed.
I’ve literally had to swap them out on over 12 mep 30’s for threaded NPT fittings.
Any regular hydraulic hoses work perfect for these applications.
Find one with a PTFE core hose, for excellent low temperature compatibility.
Any hose store can make these for you with NPT compression fittings, same day.
Very common in the food/beverage processing industry.
