Coupling 2 different PSI rated tanks together
(Washington, DC, USA)
I have a system with a 240 gal / 250 psi rated tank and a 240 gal / 400 psi rated tank. They are currently coupled together, and the system operates at 200 psi. However, the field personnel want to increase the system pressure to about 380 psi. Is there a way of having both tanks in the system without the 250 psi tank being overpressured? I am trying to use what is already there. Or is that impossible and I must get a 400 psi tank? Thanks.
The system serves two air start systems (one engine at 150 psi and the other engine at 200 psi) with one engine requiring ~350 cfm at 200 psi to start (calculated from the engine bore and stroke). The field personnel, which uses the engines for training purposes, want the tanks to recharge in 10 minutes and foresee several engine starts over a 50-minute period with simulated fail starts (a limiter switch limits a failed start cranking time to 10 seconds).
Not sure if simply increasing the pressure to 380 psi in the system would help with less charging time or multiple engine starts. I am also considering adding another compressor (Gardner Denver model APKAAD with Bore & Stroke 4-3/4 & 2-1/2 x 4) in parallel to the existing same compressor. The
The overall goal is to improve the charging time of the air tanks and to provide multiple engine starts over the 50-minute period.