AIR COMPRESSORS 



65 



Westinghouse Air-Brake Company furnishes in addition to 

 rings of standard thickness, cut rings for air and steam pistons 

 .006 in. thicker than standard, uncut rings for air and steam 

 pistons .012 in. thicker than standard, and uncut main- valve 





FIG. 1 



piston rings .006 in. thicker than standard. No extra charge is 

 made for repair pistons and rings of the standard stock sizes listed. 

 The reference numbers for the parts of the steam and aii 

 pistons for 8-in., 05-in., and 11-in. pumps are given in Fig. 1, 

 while the reference numbers 

 for the parts of the main- 

 valve pistons are given in 

 Fig. 2. Only the sizes of pis- **" 

 tons and rings given in the 

 accompanying tables are made 

 and carried in stock. The pis- 

 tons and rings are designated by the diameter of the cylindet 

 for which they are suitable, proper allowance for clearance 

 and fitting being provided for. 



FIG. 2 



FIG. 3 



The reference numbers for the parts of the high-pressure 

 steam piston and low-pressure air piston are given in Fig. 3. 



