198 TRIPLE VALVES 



PC. No. Ref. No. Name of Part 



1,748 21 Graduating stem. 



1,523 22 Graduating spring. 



1,753 23 Cylinder-cap gasket. 



4,879 24 Bolt and nut, for cylinder cap. 



1,752 25 Capscrew. 

 1,00-1 ^-in. pipe plug. 



1,755 27 1-in. union gasket. 



1,738 28 Emergency- valve nut. 



1,773 30 Emergency-piston ring. 

 2,427 Triple-valve gasket. 



If the old-style valve or graduating valve is desired, specify 

 as follows: 



PC. No. Ref. No. Name of Part 



1,769 3 Slide valve. 

 1,732 7 Graduating valve. 



These parts are not interchangeable with present standard 

 parts. The new-style slide valve, Piece No. 29,138, has a 

 straight drill through the longitudinal center line of the slide 

 valve for the new j^-in. graduating valve, Piece No. 29,139. 

 The old-style slide valve, Piece No. 1,769, has a i-in. drill 

 with counter bore for the old graduating valve, Piece No. 1,732. 

 The graduating valves may be distinguished by the difference 

 in diameter and the fact that the old-style has a shoulder, 

 whereas the new-style has none. The slide valve of this triple 

 valve is similar to that of the H triple valves. 



P-2 (F-29), QUICK-ACTION, PASSENGER, TRIPLE 

 VALVE 



The P-2 (F-29), quick-action, passenger, triple valve, shown 

 in Fig. 2, is used with the 12-in., 14-in., and 16-in. passenger 

 car and passenger-tender brake cylinders; its weight is 43 Ib. 

 Though similar in appearance, this valve differs essentially 

 from all other quick-action triple valves, and should never be 

 used except as specified. In addition to being marked P-2 

 on the valve body, it may also be distinguished from the freight 

 triple valves by the fact that it has but one exhaust outlet, 

 while the freight triple valves have two ; it may be distinguished 

 from the P-l triple valve in having three instead of two bolt 

 holes in the back flange. The bore of the P-2 slide-valve 



*Listed for convenience only; not included in P-l triple 

 valve. 



