1. RAILWAY’S AIR BRAKE SYSTEM

2. hiSTORY
. In starting breakmen have to jump from car for setting handbrakes.
.The next generation of brakes added a compressor to the locomotive
 .The brake pipe was connected to an air cylinder on each car
. George Westinghouse invented triple valve and on got patented on March 5, 1872 and on this today’s air brake system of train is based

3.   INTRODUCTION
The air brake is the standard, fail-safe, train brake used by railways all over the world.
 It is based on the simple physical properties of compressed air.
By compressed air desired force required for breaking the train is applied on block and train motion ceases.

4. Basics A moving train contains energy, known as kinetic energy
To stop the train this energy must be changed in another form
While stopping the train this kinetic energy is converted into heat energy by friction
The conversion is usually done by applying a contact material to the rotating wheels or to discs attached to the axles. 

5. AIR BRAKE AND VACUUM BRAKE
AIR BRAKES SYSTEM
VACUUM BRAKE
Air is filled in the pipe
Vacuum is created in the pipe
Take less time during starting
Takes more time during starting
More effective and reliable
Less effective and less reliable
Diameter of feed and brake pipe is
25 bore
Diameter of train pipe is 50 bore
Pressure in feed pipe is 6kg/cm2 and that in brake pipe is 5kg/cm2
Effective pressure on piston - 0.kg/cm2

6. COMPONENTS OF AN AIR BRAKE
.Compressor
.Reservoir
.Unloader Valve
.Air Dryer
.Feed Valve
.Equalizing Reservoir
.Brake Pipe
.Angle Cocks
.Coupled Hoses
.Triple Valve

7. Working of air brake system can be explained on the basis of different position of brake valve: 1. Brake Release

8. 2. Brake application

9. 3.Brake lap

10. Two Pipe Systems:
A problem with the design of the standard air brake is that it is possible to use up the air in the auxiliary reservoir more quickly than the brake pipe can recharge it
This system is used to overcome the overuse of auxiliary reservoir air

12. THANK YOU