Once again I am lucky to work for a service and repair facility, since they have a very nice spray foam machine that I can use.I have one last question, do you use a pour-then-expand insulation foam, or a spray foam?
Once again I am lucky to work for a service and repair facility, since they have a very nice spray foam machine that I can use.I have one last question, do you use a pour-then-expand insulation foam, or a spray foam?
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
Here is another picture of my Cold Trap machine giving you a more "bird's eye" view of the compressor, air-cooled condenser, fan, and the modifications I made (bullet style liquid line dryer, suction and discharge access fittings). This also shows the corrected position of the suction access fitting, which fixed a small boo boo I made on the initial build (I accidentally had it pointing towards the front which you can see is occupied by the electrical box).
As part of the modifications, it is also necessary to cut the rear motor shaft and remove both the evaporator fan and evap (these were originally inside the Styrofoam box). Actually the evap is another bonus which could be used as an air-cooled condenser for some other project.
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
We use a MIL-SPEC foam which I don't recall the density of (I can try to find out). Yes Great Stuff is not a good substitute (whatever happened to the real polyurethane in a can?).Ah, do you know the foam density? Great Stuff isn't very good, so I'm purchasing some two part pour 8lb density foam.
Yes, very plausible. R290 instead of R22 I presume. The R1150 should do nicely to get you to -100C although R14 would be even better (understandably more expensive and harder to get in small quantities).do you think r11, r290, r23, r1150 might be a plausible creation?
Michael St. Pierre
- Worked 15 years for Polycold Systems
- Now Self-Employed
- Manufacture Heat Load Controllers
- Also do contract service work on Polycold units
Side note: I usually don't respond to PM's or emails regarding the projects that I post in the forums. I feel it's much more fair to all, to answer questions within the forum topics themselves.
great
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