. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . Fig. 37. Westinghouse B-6 Feed Valve, Showing Valve and Pipe Bracket Complete AIR BRAKES 51 pressure desired, the stop should then be brought in contact withthe handle pin, at which point it should be securely fastened bythe tightening screw. The regulating handle should then be turneduntil the higher brake-pipe pressure is obtained and the stop isbrought in contact with the handle pin and securely usual and recommended pressures for low and high
. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . Fig. 37. Westinghouse B-6 Feed Valve, Showing Valve and Pipe Bracket Complete AIR BRAKES 51 pressure desired, the stop should then be brought in contact withthe handle pin, at which point it should be securely fastened bythe tightening screw. The regulating handle should then be turneduntil the higher brake-pipe pressure is obtained and the stop isbrought in contact with the handle pin and securely usual and recommended pressures for low and high pressuresare 70 pounds and 110 pounds, respectively. The B-G feed valve, like the C-C feed valve, is also used. Fig. 38. B-6 Feed Valve, Showing Valve Removed from Pipe Bracket Courtesy of Westinghouse Air Brake Company, Wilmerding, Pennsylvania as a reducing valve. When used in this capacity it is fitted to apipe bracket as illustrated in Fig. 38. TRIPLE VALVES In the study of the triple valve it is well to keep in mind thatits essential parts consist of a cylinder fitted with a piston, themovement of which operates a slide valve. As long as the pressureremains the same on each side of the piston it cannot move, butwhen the pressure on one side is changed the piston will movetoward the side having the least pressure. It is of vital importancethat this principle be thoroughly understood, as practically allautomatic devices of the air brake are constructed along this principle, as stated by the Westinghouse Company, is asfollows: 52 AIR BRAKES The devices used in connection with the air brake, which are automaticin their action, and of which the triple valve is one, depend for their op
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