AIR COMPRESSORS 



77 



STANDARD GOVERNORS AND STEAM VALVES FOR 

 STEAM-DRIVEN AIR COMPRESSORS 



The Westinghouse Air-Brake Company made an extended 

 series of tests to determine the conditions under which their 

 several types and combinations of one or more compressors 

 will operate to the best advantage. They recommend the 

 following combinations: 



TYPE S-4 (1-IN.), COMPRESSOR GOVERNOR 



The piece number for the type S-4 compressor governor, 

 complete, shown in Fig. 1, is 24,974; for the steam portion, 

 complete, it is 2,048; and for the diaphragm portion, complete, 

 20,782. The piece and reference numbers of the various parts 

 are given in the accompanying list. The 1-in. union swivel, 

 Pc.No. Ref. No. Name of Part 



2,018 2 Steam-valve body. 

 2,028 3 Cylinder body. 

 2,024 4 Cylinder cap. 

 2.023 5 Steam valve, complete. 

 2,173 6 Piston, includes 7, for standard cylinder, 

 2J in. diameter. 



17.282 6 Piston, includes 7, for rebored cylinder, 



2^ in. diameter. 



17.283 6 Piston, includes 7 for rebored cylinder, 



2fg in. diameter. 



17.284 6 Piston, includes 7, for rebored cylinder, 



2H in. diameter. 



17.285 6 Piston, includes 7, for rebored cylinder, 



2| in. diameter. 

 15,013 7 Piston ring, for standard cylinder, 2J in. 



diameter. 

 15,583 7 Piston ring for rebored cylinder, 2^y in. 



diameter. 



*These are the 8$ -in., cross-compound, air compressors. 



