TN-Steve
Contributor
I'm a little confused. If all supply cylinder valves are open at the same time, you don't actually have a cascade, do you? My little basement fill station has 7 supply tanks leading to a manifold that has a gauge and leads to a whip with a needle valve. On the far side of the needle valve is another gauge (digital) and the whip to the receiving tank. But my supply cylinders are only opened one at a time. That's what creates the cascade. The supply cylinder is opened all the way. The gauge on the manifold reads the supply tank pressure. The bottle being filled is opened all the way. The gauge on the whip at the receiving tank reads that pressure. There is a check valve at the manifold so gas can not flow back into the supply side. The needle valve controls the flow.
Have I been doing it wrong all these years?
iPhone. iTypo. iApologize.
Nope, you're right. The fill station at the shop doesn't have a needle valve and a check valve, but same idea. I use the bank tank valve to control the flow. And you're right, if you open them (the bank bottles) up at the same time, you don't have a cascade. (as I had to educate some of my co-workers).
Thanks
Steve