378 



CONDUCTOR'S VALVES 



PC. No. Re.f. No. Name of Part 



13.574 8 Valve lever. 



13.575 9 Operating lever. 



13.576 10 Rivet. 

 2,958 11 Cotter. 



A-l CONDUCTOR'S VALVE 



The A-l conductor's valve, which is shown below and is 

 tapped for f-in. pipe, is an old design of the self-closing type, 

 and is no longer used except in special cases, It weighs 6 Ib. 

 The piece and reference numbers of the valve and its parts are 

 given in the accompanying list. 



Name of 

 Part 



A-l Conduc- 

 tor's valve, 

 complete. 



Body.bush'd. 



Vent valve, 

 complete, 

 includes 4. 



Rubber seat. 



Valve spring. 



Upper cap. 



Lower cap. 



Extension 

 stem. 



Lever, in- 

 cludes ring. 

 Lever braok't. 



Screen. 



OPERATION OF CONDUCTOR'S VALVE 



The conductor's valve is connected to the brake pipe by 

 means of a branch pipe, and when open makes a direct 

 passage from the brake pipe to the atmosphere. The valve 

 is intended to be used only in case of emergency. It should 

 be opened wide and held open until the train comes to a stop, 

 for if allowed to close and the engineer's brake valve is in run- 

 ning position, the brakes will be released again. 



