TRIPLE VALVES 177 



release portion, as illustrated in Fig. 7 (b), is supplied; therefore, 

 the following piece numbers, covering the retarded-release 

 portion, must be specified when ordering repair parts for the 

 converted triple valve, otherwise all repair parts for both 

 triple valves are identical. 



PC. No. Ref. No. Name of Part 



29,206 2 Triple-valve body, complete, includes f-in. 



pipe plug. 



27,331 29 Retarding-device body, marked K-2-C. 

 28,942 31 Retarding stem. 



o, 



0- 0' 



FIG. 9 FIG. 10 



Fig. 8 shows two perspective views of the slide valve 3, and 

 Fig. 9, the slide-valve seat; Fig. 10 is a perspective view of the 

 graduating valve 7. 



FEATURES OF TYPE K TRIPLE VALVE 



The type K freight triple valve is used only in freight service 

 and was designed to meet the conditions brought about by 

 the increase in train speeds, in length of trains, and in car 

 capacities that obtain at the present time. It is made in two 

 sizes, which can be distinguished by the mark K-l or K-2 

 on the side of the valve body. The K-l triple is used with 

 6-in. and 8-in. brake cylinders, and the K-2 triple with 10-in. 

 brake cylinders. Another difference between the K-l and 

 K-2 triples is that the K-l triple has but two bolt holes while 

 the K-2 triple has three bolt holes in the reservoir flange. 

 The K-l triple and the F-36 triple are so made that they will 

 bolt to the same reservoir; the K-2 triple and the H-49 triple 

 are so made that they will bolt to the same reservoir. 



The old type H triple valve that is in general use in freight 

 service was designed for maximum trains of fifty cars of 

 30-T. capacity. The practice of running trains of greater 

 13 



