luben

Thanks for fast response ndi, that was useful, I've now got a much better visualisation of understanding whats going on. Cheers L

Hi Good Folks I've been looking at Boyles laws but I‘m still having difficulty visualizing the basic rules of transference of compressed air / volume and how to apply Boyle Laws. I have created a scenario below can anyone help me towards the understanding. Assume there are two compressed air cylinders. Cylinder A is volume 100m3 @ 2000psi. Cylinder B volume 10m3 and currently at normal atmospheric (14.7psi). Also Assume that the two tanks are connected and air can be moved from tank to another via necessary connecting pipe, valves and pumps etc. So A) If I were to open the connecting valve between the tanks I understand that the pressure would eventually equalize between both tanks as high pressure seeks low pressure. But what would the equalizing pressure now be in the two tanks / how to calculate ? I assume that the overall pressure is now lower than 2000psi as an extra volume containing lower pressure has had to be filled. B) If wanted to increase the pressure in Tank B from atmospheric to 200psi using the 2000psi pressure from the large tank A. What would the new pressure / volume of air now be which remains in Tank A. C) If tank A and B both had equal pressures, e.g 2000psi. If I wanted to pump the air from Tank B into tank A so that Tank B is reduced to atmospheric. Approximately what is the max pressure required from the pump. As there is equal force between the two tanks do you literally need only a few psi to begin with, then as more air is moved to tank A so a pressure bias is created thus requiring ever increasing pressure from the pump until 2000psi is required. Or is 2000psi+ required to move any extra air into tank A even though the starting pressure from the other tank is also 2000psi. Apologies if this all sounds a bit simple or for any major flaws in my assumptions, but hey if don’t ask you ask you don’t learn huh. Greatly appreciate any help given. Cheers