My question is harder to explain than I would imagine it will be to answer. I'm trying to vaporize a non-combustible fuel source with an internal radiant coil surrounding a small vaporization chamber consisting of a heat-resistant cotton-like material being fueled by a constant drip fuel pump via a small diameter metal line. Once in gaseous form, the vapor travels through an identical metal line to a chamber where it will be meeting up with 80-140 PSI. When at this junction, will the vapor flow with the high-pressure current, or will the significantly higher pressure cause the vapor and/or the fuel source to back-up? If so, would pressurizing the fuel tank counteract such a problem? I had thought about a unidirectional check valve in the fuel line, but wouldn't the higher pressure keep it closed? Please help!