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| Chuck in E. TN:
I am in the process of rebuilding my Prest-O-Lite Acetylene (originally Union Carbide) torch. It’s 60 or so years old, inherited from my Dad. The o-rings in the valves have all hardened and the 401 handle leaks gas around the valve stem. I have ordered the proper o-rings from WeldingSupply.com as per the original instructions/parts list from Prest-O-Lite. I tried o-rings from a kit from HF with no joy. My question, should I use some type of lube on the new o-rings when I install them? Chuck |
| Lew_Merrick_PE:
--- Quote from: Chuck in E. TN on June 08, 2013, 11:01:35 AM --- My question, should I use some type of lube on the new o-rings when I install them? --- End quote --- No! -- unless you use one of the special lubricants formulated for use with oxygen. 30+ years ago I knew all the oxygen compatible lubes off the top of my head because I was working on that side of the universe, but I can assure you that general lubes and oxygen are a recipe for disaster... |
| Chuck in E. TN:
This is an acetelyne/Air torch, no Oxy. Still apply? Chuck |
| Lew_Merrick_PE:
--- Quote from: Chuck in E. TN on June 08, 2013, 11:36:50 AM ---This is an acetelyne/Air torch, no Oxy. Still apply? --- End quote --- Yes, to a lessor degree. I believe you can get away with a silicon lube for most air usages. Adding fuel (carbon) to oxygen inside the flash-over valve is just asking for an unplanned pyrotechnic event... (We learned that the hard way with B17's during WWII.) |
| PTsideshow:
Standard answer is NO! none are needed. By the way when Prest o lite let their patent laspe, and everybody knocked off their torch almost all brands of the Prest o lite torch are interchangeable. I think there are around 6 different brand labeled ones currently. |
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