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The mt69
- Thread starter icdog
- Start date
Buy, or build, another and put it before your flood port and chill you butane that way, instead of chilling your tank.
On the recovery side its pretty straight forward......
On the recovery side its pretty straight forward......
Great idea!!
The Ghetto prototype.......
icdog
Member
I haven't heard of that one perma. The butane running from a ambient temp tank into the chilled mt69 is chilled fast enough?
It sounds way easier to chill since its so small. In your pic is that salt ice bath?
Why are 3 hoses coming out of the blue bucket?
You can do this with dry ice as well?
Can you post a pic of the recovery setup?
The mt69 fittings look like 1/4 jic and they had a little rubber gasket on top of then. Is that needed? I pulled one off and couldn't get it back on.
It sounds way easier to chill since its so small. In your pic is that salt ice bath?
Why are 3 hoses coming out of the blue bucket?
You can do this with dry ice as well?
Can you post a pic of the recovery setup?
The mt69 fittings look like 1/4 jic and they had a little rubber gasket on top of then. Is that needed? I pulled one off and couldn't get it back on.
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mt-69
mt-69
Fittings are 1/4 SAE 45 deg flare. Standard in refrigeration, automobiles, and beverage. I mention this not to troll, but because it is a safety issue, and will save you some cash when you switch up to 3/8 or 1/2 and realize the threads of the 1/4 in are the only ones that line up, at least that is my understanding. (I could be wrong cause I buy SAE fittings and convert to 1/4 NPT.)
mt-69
Fittings are 1/4 SAE 45 deg flare. Standard in refrigeration, automobiles, and beverage. I mention this not to troll, but because it is a safety issue, and will save you some cash when you switch up to 3/8 or 1/2 and realize the threads of the 1/4 in are the only ones that line up, at least that is my understanding. (I could be wrong cause I buy SAE fittings and convert to 1/4 NPT.)
and 1/4" JIC which is my fav so far......but above 1/4" they are not compatible, you have to switch out all the sae fitting to jic, which is simple...
Exactly the problems we had. Notice the MT-69 is on the recovery side in ice, and the 3/8" x 20' coil is in dry ice alky bath. The 3/8" is the feed line which t's off in two separate 3/8" stainless ptfe flood lines. these are flooded at different intervals.
I'm working on a stainless set up with a 50' coil and multiple flood ports, coppers just so easy to work with.
WE tried jut putting the mt69 in the dry ice bath to speed recovery and it locked up, too cold.
The mt69 also acts as a t giving me the ability to run two machines, two pumps, one heat exchanger for both. I'm probably building a new one today that will have and better t and more ball valves for the recovery side.
No I don't use DI on the mt69, as GW said its almost too cold. Its t'd in from two recovery pumps from two machines, building a new one today, its nice having paramount next door
ConcentrateChaz
Member
Copper has a C rating with butane, i want something like grey wolf has stainless steel, but only 20'' coil? is that enough? to chill the tane?
Plenty of room to add more coils, but the stainless comes in 20' sticks and it dropped the tank pressure about 100 psi.
What I am mulling over, is putting multiple coils in the same bath, so as to cool the gas at more than one stage.
For instance, we currently cool after the filter drier and just before the 100 #storage tank. We will look at also cooling after the Gast and before the axillary tank to lower its pressure as well.
HighStateToke
Member
Nakadashi, where did you acquire your stainless steel coil?
A 1/4" coil adds significant back pressure when running chilled butane, and the .785" circumference is only about 66% as much as a 3/8", 1.178" circumference, tube for heat transfer.
That gives the 3/8" 20 foot coil the equivalent surface area of a 30 foot 1/4" coil, but because of 3/8" tubing's 2.24X cross section, it also slows down the flow velocity so that more heat is transferred per unit of length.
That gives the 3/8" 20 foot coil the equivalent surface area of a 30 foot 1/4" coil, but because of 3/8" tubing's 2.24X cross section, it also slows down the flow velocity so that more heat is transferred per unit of length.
icdog
Member
I just did a quick search and found this
http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=0SNJ25M4RB26RT0X7WHJ
http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=0SNJ25M4RB26RT0X7WHJ
