. Air brake text for engineers and firemen; . I-ROM BRAKE PIPE- PLATE 32. WESTINGHOUSE TRIPLE VALVES. 77 valve. Feed groove i being again uncovered, the auxiliary reser-voir becomes recharged with air from the brake pipe. Purposes of the Triple Piston, Slide and Graduating Valves. The duty of the triple piston is to open and close the feed grooveand to guide the movement of the slide valve and graduatingvalve, and also to form a dividing line between the auxiliaryreservoir and brake pipe PLATE 33. The purpose of the slide valve is to open and close communi-cation between the brake
. Air brake text for engineers and firemen; . I-ROM BRAKE PIPE- PLATE 32. WESTINGHOUSE TRIPLE VALVES. 77 valve. Feed groove i being again uncovered, the auxiliary reser-voir becomes recharged with air from the brake pipe. Purposes of the Triple Piston, Slide and Graduating Valves. The duty of the triple piston is to open and close the feed grooveand to guide the movement of the slide valve and graduatingvalve, and also to form a dividing line between the auxiliaryreservoir and brake pipe PLATE 33. The purpose of the slide valve is to open and close communi-cation between the brake cylinder and the atmosphere and toopen and close communication between the auxiliary reservoirand the brake cylinder in conjunction with the graduating valveand the triple piston. It is also the duty of the slide valve in thequick action triple to open and close communication between theauxiliary reservoir and the emergency piston, and between theauxiliary reservoir and the brake cylinder in conjunction with thetriple piston. The duty of the graduating valve is to graduate the flow ofair from the auxiliary reservoir to the brake cylinder. DEFECTS OF THE QUICK ACTION TRIPLE VALVE. Defects that will cause a blow at the triple exhaust are, theslide valve held off its seat by dirt, the slide valve seat cut, adefective gasket 15 between the auxiliary and the triple valve,defective gasket between the brake cylinder head and the triple 78 WESTINGHOUSE TRIPLE VALVES. valve, auxiliary tube b in freig
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