As a child, I used to love watching Shirley Temple's movies and I was drawn to reading her autobiography, Child Star. This was one of the best Hollywood autobiographies I have ever read because of the way Shirley gave a complete overview of her life.
Definition of engineer's brake valve. : a valve in the cab of a locomotive for operating the air brake.
Brake Combination Valve. A three function combination valve contains the proportioning valve, metering valve, and a pressure differential switch in one convenient location. The combination valve is typically located on the firewall. A two function combination valve omits either the metering valve or the proportioning valve.Let's have a look at a three function combination valve. Metering Valve: The metering valve is in charge of delaying the application of the front brakes just long enough to overcome the rear brake springs.t's installed on vehicles with front disc rear drum braking systems. When the brakes are first applied, pressure quickly overcomes a spring in the valve and closes a port to the front brakes. This temporarily reduces fluid pressure. When the pressure builds to a predetermined amount (75-100 psi.).