|Air Bag Control Valve|
|Controls the inflation and deflation of trailer air suspension bags. There are three basic modes for air bag control:
1. A manual system which requires the user to operate the valve to inflate or deflate the bags.
2. An semi-automatic system which the user must trigger the deflation but will automatically inflate the bags when the trailer park brakes are released.
3. A fully automatic system where both the inflation and deflation functions are performed based on the trailers park mode.