Vacuum manifold on the hose (valve and tee)
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I hook up a hose between two tanks when transferring from one to the other. One tank on the dip tube, one tank on a vent port. Vent port tank gets the hose tightened. Dip tube tank gets a loose connection. Get a wrench on the line fitting, that is lose on the dip tube connection. crack the valve on the vent port connected tank, pressurizeling the line with gas, forcing out the atmosphere. Tighten quickly at the dip tube tank connection when you feel you’ve purged the line.
I used to be anal and had tees to vac lines down. Fuck that shit.
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Gotcha
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Understood.
You da man 
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Or clear the line before you completely connect it. Lil unorthodox, but if you want to make an omlet, you gotta break an egg.
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If you use a tankless hot water heater you will need a water pump with the correct flow rate for the heater you are using. You will also need a reservoir tank to hold the water
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not if you’re running the air compressor 2ft from the extractor…or even in the same room.
AIR is not a source of ignition. Electrickery IS.
so this is a safer way of performing the trick, but if you do stupid shit with the exhaust, or the air compressor, you can absolutely make this dangerous.
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Sorry for raising the dead… may I ask why not go straight into warm water?
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Thermal shock. -70°~ steel into 90° some of those parts may not be the same shape
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Ofcourse…
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You just saved me a lot of back ache
Nice finagle
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Sorry to bombard this post from 019
So you guys are talking about pulling a vac on the solvent tank prior to starting the run?
I never thought to do this as the solvent tank initially was under vac before it was filled with butane
I use pure n butane
So I guess during this process of filling the solvent tank up, and from previous recoveries the solvent tank loses vacuum? I never thought of pulling a vacuum on a chamber that’s been vacuumed once
Safety was always a concern but after reading above I understand as long as you have the tank as cold as possible butane will remain liquid and it’ll be okay to pull some vac not huge amount
How much vac to be pulled? I would like to post some pictures with annotations before I attempt this
Curious on the same thing. Not about to pull vac on my tank full of tane even if it is in a slurry lol
Your ability to pull a vacuum over a pool of butane in a tank is directly related to the temperature of the butane.
I don’t do this anymore, as I’ve got a 100 lb injection tank and a 50 lb recovery tank. The recovery tank starts the run having a vac pulled on it. Building a system that is inherently safe is a good idea.
Previously, I would end up with nitrogen in my solvent tank after pushing all the solvent through into the collection. I would burp the nitrogen out of the tank, and then pull a partial vacuum over the butane that had recovered. The butane that had recovered was quite cold, so a partial vacuum was easily achievable and greatly accelerated my recovery.
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@ExtractionUK when people achieve vacuum in the tank during recovery it’s not full vacuum. Just slight negative pressure can be achieved. But that slight negative pressure will have your recovery flowing fast as fuck. You’ll only be able to keep this vacuum if all your temps are perfect. COLD! Really fucking cold. Every now and then I’ll dump all the pressure in my recovery tank to zero, then start recovering, and my tank will naturally be so cold it turns into a vacuum by itself. Recovery looks like 2 garden hoses dumping tane in the tank
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Is the only way to achieve this with slurry? Or is it possible with just ice
Debatable.
Given the right heat exchanger and recovery vessel, I can keep it at near full vac.
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I just said this in another thread… it also will cause the collection to go into a rapid boil
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And boil over? Anyone happen to also have a way to calculate my collection size? I was told running 3lbs/minute in a 12x36 might cause a boil over? 13kw heating, 1.5” recovery going to 2x 1/2” coils and this got me thinking and worried lol
I’ve seen a 12x24” boil over. Recovery was so fast it shot up from a 6” deep pool up and into my mol sieve.
You need to start recovery upon injection into the collection vessel, this way your working on recovering that mass of fuel from the get go.
Add a recovery tank, and change your life
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