Control.com - Nerds in Control

I have a high volume flow gas line with a pressure regulator followed in less than 50 ft. by a flow control regulator. A very high degree of coupling exists between the two regulators. Decoupling is not the issue.

The very short transport time makes this system have a very high gain. At high loads the controller gain can not be reduced enough to tune the system.

In the past I have increased the line size say from 8" to 36" in order to increase the transport time, and decrease the system gain. This larger pipe acts as an accumulator that is in series with the flow.

My question is, can I use a pipe line accumulator, typically used for pulsation damping, that has a bladder which is gas filled, attached to a 'Tee" on the line and accomplish the same function? In this case the gas will not be flowing through the accumulator.

Thanks,
Ron