164 TRIPLE VALVES 



result of the experiments and tests conducted resulted in an 

 improved type of freight triple valve called the type K triple 

 valve. 



H-l (F-36), QUICK-ACTION, FREIGHT, TRIPLE VALVE 



The H-l (F-36), quick-action, freight, triple valve, shown in 

 Fig. 1, was used with 6-in. and 8-in. freight-car brake cylinders 

 and 8-in. passenger-tender brake cylinders, but it has been 

 quite generally superseded by the K-l quick-action, quick- 

 service, uniform-release, and uniform-recharge freight triple 

 valve, which is regarded as standard for this service. It 

 weighed 38 Ib. Though similar in appearance, this valve 

 differs essentially from other quick-action triple valves, and 

 should never be used except as specified. In addition to being 

 marked H-l on the valve body, it may be distinguished 

 from the passenger triple valves, type P, by the fact that it 

 has two exhaust outlets (one of which is plugged) and from the 

 H-2, 10-in., freight, triple valve in having two instead of three 

 bolt holes in the back flange. The bore of the H-l slide- 

 valve bush is 1J in. in diameter. The piece number of the 

 H-l triple valve, complete, is 1,717, the piece and reference 

 numbers of the various parts are given in the accompanying 

 list. 



PC. No. Ref. No. Name of Part 



20,220 2 Body, complete, includes f-in. pipe plug. 



1.729 3 Slide valve. 



1,725 4 Main piston, includes 5. 

 10,032 5 Main-piston ring. 



1.730 6 Slide-valve spring. 



1.732 7 Graduating valve. 



1.733 8 Emergency piston. 

 1,740 9 Emergency-valve seat. 



1,735 10 Emergency valve, includes 11 and 28. 

 1,737 11 Rubber neat. 



1.745 12 Check- valve spring. 



12,850 13 Check-valve case, complete, includes i-in. 



pipe plug. 



1.754 14 Check-valve-case gasket. 



1,744 15 Check-valve. 



1,751 16 Strainer. 



1.749 17 1-in. union nut. 



1.750 18 1-in. union swivel. 



1.746 19 Cylinder cap. 



