Because of all the current sturm and drang surrounding recovery pumps, I ordered a Haskel pneumatic to carry the day, until we can sort it out. I got the longer design, which has the two cylinders separated by enough space, that a leak on one will not compromise the integrity of the other.
I started with a Robinair non oil less recovery system, but decided not to use it because of its not oil less design.
I wore out a brand new Microvac oil less in about two days trying to pull vacuum with it.
I blew my first Appion in two weeks developing the process and essentially running it dry for long periods, but the rebuild lasted longer than a year with regular use, after I stopped trying to pull lower than 22" Hg.
We've since picked up half a dozen other Appions and our success rate has plummeted. In rebuilding them, I also notice more half shims appearing under the cylinders than previously, so it would appear the alignment isn't as precise has it once was.
Perhaps with the added volume, their quality has fallen and they are using things they might not have in the past.
We've tried the CPS TR-21 in conjunction with a Mt-69 after cooler with good success, but we have also fried a couple of them.
We are experimenting with Regis's Caresaver, but can't in good faith use a compressor that isn't oil less, because of the possibility of co mingling of the two streams, and the implications if something goes wrong, goes wrong, goes wrong....................
One of the reasons that our initial Appions lasted better than the later ones, is that our process has shifted from large quantities of oil for cancer patients, to longer runs at subzero temperatures to produce carboxylic acid. A 15 minute run, suddenly becomes a 1 hour run, with a great deal of that time spent under vacuum.
Another reason that I picked up the Haskel, is that I want to experiment more with Propane, which just exacerbates the problem that we are having with current recovery pump options.
It occurs to me, that using a gas that is easier to purge than even Isobutane, will make it easier to retain monoterpenes and our experimentation so far supports that, but it also takes more than twice as long to recover.
There are also not a bunch of laws popping up against Propane extraction, because some boneheads are blowing themselves up doing open extraction indoors.
I started with a Robinair non oil less recovery system, but decided not to use it because of its not oil less design.
I wore out a brand new Microvac oil less in about two days trying to pull vacuum with it.
I blew my first Appion in two weeks developing the process and essentially running it dry for long periods, but the rebuild lasted longer than a year with regular use, after I stopped trying to pull lower than 22" Hg.
We've since picked up half a dozen other Appions and our success rate has plummeted. In rebuilding them, I also notice more half shims appearing under the cylinders than previously, so it would appear the alignment isn't as precise has it once was.
Perhaps with the added volume, their quality has fallen and they are using things they might not have in the past.
We've tried the CPS TR-21 in conjunction with a Mt-69 after cooler with good success, but we have also fried a couple of them.
We are experimenting with Regis's Caresaver, but can't in good faith use a compressor that isn't oil less, because of the possibility of co mingling of the two streams, and the implications if something goes wrong, goes wrong, goes wrong....................
One of the reasons that our initial Appions lasted better than the later ones, is that our process has shifted from large quantities of oil for cancer patients, to longer runs at subzero temperatures to produce carboxylic acid. A 15 minute run, suddenly becomes a 1 hour run, with a great deal of that time spent under vacuum.
Another reason that I picked up the Haskel, is that I want to experiment more with Propane, which just exacerbates the problem that we are having with current recovery pump options.
It occurs to me, that using a gas that is easier to purge than even Isobutane, will make it easier to retain monoterpenes and our experimentation so far supports that, but it also takes more than twice as long to recover.
There are also not a bunch of laws popping up against Propane extraction, because some boneheads are blowing themselves up doing open extraction indoors.
