George,

Without looking at the Beaver system it would not be possible to determine the function of the pressure regulator.

Slowing or speeding the process of adding or exhausting air from the air bags is something Prevost does on older coaches using a time delay ride height valve, but they have gotten away from that and now use instant reaction valves. They will also supply the instant acting valves as replacements for the time delay ride height valves.

If Beaver used a regulator to slow down the reaction time they could have saved lots of money by just using a valve in line to function like a faucet, opening or closing it as required to regulate the flow of air.