Volume pump vs. Back Pressure Regulator

[darkSol]

I read in one of the steam user guides that you can use a bPR set to 0 to evacuate all the gas in the pipes behind it. So that got me wondering whether it's a better option versus the volume pump for doing this. I also read that the PR and bPR are very slow, so this would possibly be one consideration.

My current task is to set up a portable tank stand for putting mixed gasses into my filtration. I want to empty the contents quickly so I'm tempted to go with the VP. I also wonder if the filtering machines themselves pull all the gas from the pipe, in which case is it even needed to put a VP or bPR on the input side.

[Bauhaus]

The air filters will pull gases in, but at a very slow rate (9 liters/tick iirc), which puts you on a similar boat as the backpressure regulator. If you want a quick flow, your best bets are the volume pump, an active vent, or depressurizing one end of the pipe with backpressure regulators and a digital valve.

The volume pump would really be the simplest solution.

[darkSol]

Thanks, that's good info. I'm unclear on the use of the active vent. In this case I'm dealing strictly with a pipe network, emptying a tank into the filtration system. I can't see a way you could use a vent in that scenario. I'm only asking because I like to learn as many solutions as I can for any given problem. May not be the way to go for this, if VP is the simplest, but it might be perfect in another instance.