TRIPLE VALVES 

 FUNCTIONS OF TRIPLE VALVE 



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The triple valve has three duties to perform: to charge 

 the auxiliary, to apply the brakes, and to release the brakes. 

 When an engine is coupled to a car, air from the main res- 

 ervoir flows into the brake pipe, thence through the branch 



n o> n o o 



pipe, into the triple valve. When the triple is cut in, the air 

 can flow in at the brake-pipe connection, and down through 

 a port into the chamber below piston 5. If piston 5 were down, 

 the air pressure B would force it up into release position. 



