[evfreek]

Hi. I bought a brazing torch set and found that the valves are a little sticky. It is a National 3A torch. What do you recommend for greasing the valves to free them up? I would be tempted to use Black Swan, but this might not be safe. The welding supply sells Krytox, which is definitely oxygen safe, but this is $81 for a 2 oz tub (enough for hundreds of torches). Dupont 111 might be OK, but it is not recommended for liquid oxygen service. Somebody suggested silicone high vacuum grease. I suspect that any of the non-petroleum based greases should be OK for low pressure oxy service, but its best to be safe.