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Post by coldspaces on Aug 12, 2018 1:57:20 GMT
I recently needed to empty Travis's DR35 and my latest CG I haven't found time to post about. As we all know it not a pleasant thing to get out the so2. This time I found that if I place my shop blower (former furnace blower) close to the place the so2 is exiting and mix about 1200 cfm of air with it it helps a lot. Still needs to be done on a day with wind but did make for a more friendly process.  so2 delution |
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Post by turbokinetic on Aug 12, 2018 2:44:34 GMT
I recently needed to empty Travis's DR35 and my latest CG I haven't found time to post about. As we all know it not a pleasant thing to get out the so2. This time I found that if I place my shop blower (former furnace blower) close to the place the so2 is exiting and mix about 1200 cfm of air with it it helps a lot. Still needs to be done on a day with wind but did make for a more friendly process. so2 delutionThat works! Because, afterall, the solution to pollution is.... dilution! :-)
Another thing that I almost posted on was using vacuum pump on one of these after a minor repair, where SO2 residue can be inside. I almost ruined my good electric pump when working on Andrew's CK a while back. On my latest CK, I used a compressed-air powered (venture) vacuum pump. Also, bought a hard plastic air hose that wouldn't collapse from vacuum. Routed that hose, plus an actual air hose, outside the barn, and let it rip in a windy environment.
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Post by coldspaces on Aug 12, 2018 3:04:46 GMT
I recently needed to empty Travis's DR35 and my latest CG I haven't found time to post about. As we all know it not a pleasant thing to get out the so2. This time I found that if I place my shop blower (former furnace blower) close to the place the so2 is exiting and mix about 1200 cfm of air with it it helps a lot. Still needs to be done on a day with wind but did make for a more friendly process. so2 delutionThat works! Because, afterall, the solution to pollution is.... dilution! :-)
Another thing that I almost posted on was using vacuum pump on one of these after a minor repair, where SO2 residue can be inside. I almost ruined my good electric pump when working on Andrew's CK a while back. On my latest CK, I used a compressed-air powered (venture) vacuum pump. Also, bought a hard plastic air hose that wouldn't collapse from vacuum. Routed that hose, plus an actual air hose, outside the barn, and let it rip in a windy environment.
I use my grandfathers Duo Seal Vacuum pump for most everything. I believe he bought it in about 1965. I use it do do everything including pulling the left over so2 out (still can't seem to get it all out) of these refrigerating machines we love so much. It is belt drive and weights about 85 lbs. I do have a modern one too but have never subjected it to so2. It has an aluminum body that I didn't think I should put so2 through. |
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Post by turbokinetic on Aug 12, 2018 3:50:10 GMT
That works! Because, afterall, the solution to pollution is.... dilution! :-)
Another thing that I almost posted on was using vacuum pump on one of these after a minor repair, where SO2 residue can be inside. I almost ruined my good electric pump when working on Andrew's CK a while back. On my latest CK, I used a compressed-air powered (venture) vacuum pump. Also, bought a hard plastic air hose that wouldn't collapse from vacuum. Routed that hose, plus an actual air hose, outside the barn, and let it rip in a windy environment.
I use my grandfathers Duo Seal Vacuum pump for most everything. I believe he bought it in about 1965. I use it do do everything including pulling the left over so2 out (still can't seem to get it all out) of these refrigerating machines we love so much. It is belt drive and weights about 85 lbs. I do have a modern one too but have never subjected it to so2. It has an aluminum body that I didn't think I should put so2 through.
Interesting. My pump has an aluminum casing, but what happened was the oil had taken on water from other projects since the last change. This reacted with the SO2 and caused the oil to turn to stinky sludge. The iron rotor housing corroded somewhat and caused the pump to be frozen up. I got it running again with new oil and it has seemed to be OK. An all-iron unit would be better, I'm sure!
I did notice that after multiple evacuations, I still smelled SO2 when adjusting the charge on Andrew's CK. Doubt that will affect the performance of the unit, but certainly won't try to recover the R152A from a converted SO2 unit! I am sure the recovery machine would be wrecked.
Forgot to say it earlier - but hope to see your repairs to Travis's DR 35. Love seeing these early DR's being restored. I hope to refurbish one myself some day!
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