Later on, in 1869 to be exact, the engineer named George Westinghouse invented the first triple-valve Airbrake system for railcar use. His system was working in the opposite way from the previous direct Airbrake system, and performed three functions as its name is implies.
The triple –valve Airbrake system main functions are:
- Charging;
- Applying; and
- Releasing.
Charging
The system must be filled with air before the brakes will release. Even though the brakes remain engaged at rest, as soon as the system reaches its operating pressure, and the brakes are ready to use.
Applying
The air pressure decreases when the brakes are applied. When the air decreases, the valve allows air back into the reservoir tanks and the brakes move to the applied position.
Releasing
When you apply the brakes, the air will escape after braking, and all that pressure will release the brakes. In order to release the brakes, the triple-valve system fills a supply tank and uses air pressure. So, the brakes in a triple-valve system remain fully engaged until air is pumped throughout the system.
Where Are They Used?
I can’t stress enough the importance of the Air Brake systems. They are one of the most important truck equipment.
