82 



AIR COMPRESSORS 



regulates the pump properly. If the governor does not start 

 the pump promptly on a slight reduction, it may be due to 

 leaky diaphragm valve, or to the vent port being stopped up. 



TYPE SD-5 COMPRESSOR GOVERNOR 



The piece number of the SD-5, compressor governor, com- 

 plete, shown in Fig. 2, is 22,067; for the steam portion, com- 

 plete, 17,879; and for the diaphragm portion, complete, 20,782. 

 The piece and reference numbers of the various parts are given 

 in the accompanying list. If j-in. iron pipe is to be used for 

 air connections, specify Piece No. 18,019, for SD-5 compressor 

 governor, complete, and Piece No. 2,047, for diaphragm por- 

 tion, complete; then union swivel, Ref. No. 40 will be substi- 

 tuted for union swivel, Ref. No. 30. 



PC. No. Ref. No. Name of Part 



17,668 2 Steam- valve body. 

 17,672 3 Cylinder body. 

 17,671 4 Cylinder cap. 

 17..670 5 Steam valve, complete. 

 17,916 6 Piston, includes 7, for standard cylinder, 



2J in. diameter. 

 21,606 6 Piston, includes 7, for rebored cylinder, 



2ff in. diameter. 

 Piston, includes 7, for rebored cylinder, 



2ff in. diameter. 

 Piston, includes 7, for rebored cylinder, 



2f in. diameter. 

 Piston, includes 7, for rebored cylinder, 



2 1 in. diameter. 

 Piston ring, for standard cylinder, 2f in. 



diameter. 

 Piston ring for rebored cylinder, 2ff in. 



diameter. 

 Piston ring for rebored cylinder, 2f in. 



diameter. 

 Piston ring for rebored cylinder, 2J in. 



diameter. 

 Piston ring, for rebored cylinder, 2J in. 



diameter. 

 Piston nut. 

 Piston spring. 

 IJ-in. union nut. 

 li-in. union swivel. 

 Siamese fitting. 



Diaphragm body, includes 29. 

 Spring box. 



