4 AIR-BRAKE EQUIPMENT 



ET, A-l, AD, etc. A list of the apparatus found in each equip- 

 ment is here given, together with the symbols and unit desig- 

 nations. The specifications given are for 1-in. pipe on the 

 locomotive, which is the recommended practice, but if desired 

 IJ-in. pipe may be used; if this is desired the fact should be 

 mentioned when the order is given. When two 93-in. compres- 

 sors are ordered for a single locomotive equipment, the SF-5 

 (ls-in.) pump governor, and IJ-in. steam valve should be 

 specified instead of the SF-4 pump governor and 1-in. steam 

 valve. Owing to the difference in practice, on the different 

 roads, as to the number and capacity of reservoirs, no main 

 reservoirs or their drain cocks are included in the lists. 



The details of the truck-brake apparatus for the No. 6 ET 

 and the No. 5 ET equipment are given later, under the heading 

 Special Locomotive Brake Equipments. Schedule L air-sig- 

 nal apparatus must be used with these two equipments and 

 not schedule J apparatus, which is used with the A-l brake 

 equipment. 



DETAILS OF No. 6 ET LOCOMOTIVE BRAKE EQUIPMENT 



For Engines 



Air compressor of size specified. 

 SF-4 pump governor. 

 1-in. steam valve. 

 1-in. main-reservoir cut-out cock. 

 Union stud for f-in. O. D. copper pipe. 

 B-6 double-pressure feed-valve, with pipe bracket 



and gasket, complete. 



1 H-6 automatic brake valve, with pipe bracket, com- 

 plete. 



1 Equalizing reservoir. 



1 5-in. duplex air gauge; main and equalizing reser- 

 voirs. 

 1 3 5-in. duplex air gauge; brake-cylinder and brake 



pipe. 



4 Gauge union studs. 

 1 1-in. cut-out cock; double heading. 

 1 C-6 single-pressure feed- valve, with pipe bracket 

 and gasket, complete; for independent brake, and 

 signal system. 

 1 S-6 independent brake valve, with pipe bracket, 



complete. 



1 No. 6 distributing valve, with E-6 safety valve, 

 i-in. drain cock, and double-chamber reservoir, 

 complete. 



