not rated for r600 or r600a…
what makes you think it is appropriate?
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Full disclosure someone had asked me about these. I was asked if these would work, I came to the conclusion that they were not because its not rated for our hydrocarbons and is not “ignition proof” or “spark proof”; i just recommend a good ol trs21. I just wanted to get a second or third option, thank you @cyclopath that was the very first thing i checked.
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you need jacketed vessels, no lifting required.
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I stayed passive :
Here’s what I learned.
If you do not have a chiller and you have a jacketed base you can totally still lift it in and out of a dry ice and isopropyl slurry. But when you get to recovery and you’re about to start flooding the collection bases jacket you’ll need to open both shutoffs on the jacket because a vacuum seems to have been applied to the jacket cause of the subzero temps. So what I usually do before flooding is I apply a vacuum to the jacket to remove the frost and clear the jacket so warm water can flow through it and so I don’t have to wait and have water content build up in the collection.
If you want a nice vapor production and not have to use a shutoff in between the material column and collection then it’s ideal to have your material column jacketed for warm water recovery as well.
It’s so nice.
I figure cold solvent and cold material is good the fuck enough. I’m not making diamonds I’m not making sauce I’m not being extravagant.
When I dab its clear on the nail and it wipes off the nail without chazzing the nail so I feel good about what I already make.
But passive definitely showed me how to work with temps, times and patience.
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anyone tried one of these?
We have 30x Cmep-OLs or more we are parting with DM me if interested.
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love your username!
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I’ve asked this before but why aren’t there any dry scroll based refrigerant recovery pumps out there for hydrocarbon recovery?
I know there’s scroll compressors, surely there’s a way to shrink a scroll compressor down and make it work for hydrocarbons, no?
Not that I’ve seen. I’d be in for one. Most innovative so far that I’ve seen have been the MasterVapor’s. Essentially a gear reduced electrically driven double diaphragm pump with a system that back pressurizes the diaphragms. And I think Graco provides some of the parts. We run 2x 150XLs and a smaller 6CFM. They are incredible and a tiny footprint.
I’ve taken apart an AI dry scroll vac pump, neat design, but there are bearings that the offset rods the scroll assembly moves upon that are inside the body of the pump. On a vac pump this isn’t necessarily a problem, but using such a pump to move hydrocarbons it would mean exposing those bearings to your solvent and potentially vacuum, and then you’re back to the same problem the CMEPs have with puking oil out of the rod bearings and having to rebuild constantly.
Personally I think a rotary screw compressor is a way better tool for the job as you can seal away the bearings in an oil bath separate from the gas stream. Unfortunately when I called Leybold to inquire about doing this with one of their offerings they were total assholes to me and not many other rotary screw manufacturers that would even consider what I’m suggesting.
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I have an OG vaporhawg that I may part with for the right price…
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Yeah a screw compressor pump with a built in external cooling line would be nice, instant vapor to liquid recovery.
I have a 2 200lb tanks and 2 300L tanks? How big is that tank for 6500?
I got alot of extra stuff after last upgrade?
I wanna upgrade from running 4 trs21 to a pdx gold pump. I hear good things about those. And way quiet. 16 grand tho ouch
Though scroll pumps are sold as “dry”, the tip of the scroll is greased and would wash out with hydrocarbons. This causes contamination and eventually pump failure.
IMO, multistage roots is the best architecture that can run truly “dry” but they usually use them for vacuum pumps and not transfer pumps.
Those welch pump heads are stout AF. Only shitty thing is the owner of the company is a POS.
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Just picked up a BVV CMEP rebuild pump. Kinda nervous but it was cheap. will report back.
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https://shopbvv.com/products/corken-t491
anyone have any experience with one of these? I realize it’s the opposite of the OP (over $30k, not cheap) but a friend of mine uses one at a local extraction company
to add to the topic at hand, I can add to the votes that MVPs are a solid choice. i’ve always loved that jalopy-ass sound it makes
I used a Corken on an ETS. It was a pretty reliable pump… But that’s alota money… I think it recovered right around 1lb/min
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On mobile and for some reason it posted in this thread. Sorry