. Air brake text for engineers and firemen; . /EXEXHAUST 10 / DCVFROM DOUBLE CHECK VAUVE AND CYLINQEf\ PLATE 54. reservoir pressure, reduced to 45 pounds, reaches the lower sideof valve 8, through cavity a. AUTOMATIC & STRAIGHT AIR EQUIPMENT. 127 Plate 54 is a similar section across the shaft at exhaust valve9, showing the cavity b below this valve, the brake pipe connec-tion at DCV, leading to the double check valves and past them tothe brake cylinders; also passageway c leading from above releasevalve 9 through the exhaust opening to the atmosphere. Plate55 is a horizontal section showing th
. Air brake text for engineers and firemen; . /EXEXHAUST 10 / DCVFROM DOUBLE CHECK VAUVE AND CYLINQEf\ PLATE 54. reservoir pressure, reduced to 45 pounds, reaches the lower sideof valve 8, through cavity a. AUTOMATIC & STRAIGHT AIR EQUIPMENT. 127 Plate 54 is a similar section across the shaft at exhaust valve9, showing the cavity b below this valve, the brake pipe connec-tion at DCV, leading to the double check valves and past them tothe brake cylinders; also passageway c leading from above releasevalve 9 through the exhaust opening to the atmosphere. Plate55 is a horizontal section showing the relative positions of thevalves and connections. Shaft 2 is slotted out to the middle at two points, and valves8 and 9 are just enough off the shaft center line so that the stem. SECTION AT DOUBLE COECKVALVE ANDCYLINDER PLATE 55. of each valve will end just beneath the flanged portion of the steeltapped piece riveted into each of the shaft slots. As shown bythe sectional view (Plate 54) of valve 9, these valves are fittedwith leather seats and have steel caps to reduce the wear. In Plate 53, handle 4 is shown in lap position, valves 8 and 9being held to their seats by springs 10 and 11, and any air pres-sure that may be below them. This position embodies the spacethat can be covered by the handle movement without unseatingeither valve. Moving handle 4 (Plate 52) to the right unseatsapplication valve 8 and allows main reservoir pressure to flow 128 AUTOMATIC & STRAIGHT AIR EQUIPMENT. from chamber a, past valve 8 to chamber b, thence through pass-age b to b, bringing it under release valve 9 and in communica-tion with the pipe at DCV, by which it is carried to the doublecheck valves and, past them, to the cylinders, applying the handle 4 in the
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