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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Enviro chamber liquid CO2 question?
Hi all,
I hope I'm not too way off base here in asking for advice, but you guys seem to know everything!! :-) Boss at work bought a $99.00 environmental chamber and told me to "make it work". ( this one's sibling: http://cgi.ebay.com/AES-ENVIRONMENTA...8 6.m20.l1116) When we recieved it, it didn't "do" anything. I kept flipping the switch back & forth and eventually some sticky relays started "working", that is, the heater /fan started working and the gas solenoid clicked in - depending on the temperature dial. A label on the back says it is to be cooled with liquid CO2. Somebody retrofitted it with a 300PSI solenoid - We have since then gotten a 1000PSI liquid CO2 solenoid. The wiring in it is OLD and BRITTLE, BTW. A few hours ago my boss is on my ass to get the cooling working by next week. Now I have a basic oxy/acetylene rig at home, but have never played with liquid CO2. I'm not exactly sure of what fittings/tubing to use ( copper, stainless, double flare??). Also, the boss says that CO2 isn't toxic, so therefore we aren't going to vent it. (it's setup in the back of a kitchen, where I work {our "lab"}- with zero ventilation) I don't mind doing potentially dangerous stuff in my own garage ( with the door open), but this is an office full of people. Am I way off base telling him to hire a professional to do the gas fitting ( and leave the premises when he runs it without ventilation?) Just wanted another opinion. (And yes, I am looking for another job) Thanks in Advance! B |
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