. Science of railways . ed either to theright or left. Should the valve close with too muchdrop of boiler pressure, move the screw-ring (C) to theleft, a notch or two at a time, until sufficient changehas been accomplished. To increase the pop, movering (C) to the right. After the valve is adjusted tosuit the requirements, replace bolt {B) and cap (A). To examine the inside of the valve, unscrew thecap (A) and spring-bolt (F), so as to relieve thesprings tension, remove the set screws, and thedome (E) and case {G) may then be unscrewed andthe internal parts of the valve are exposed. STAR LOCOM

---

. Science of railways . ed either to theright or left. Should the valve close with too muchdrop of boiler pressure, move the screw-ring (C) to theleft, a notch or two at a time, until sufficient changehas been accomplished. To increase the pop, movering (C) to the right. After the valve is adjusted tosuit the requirements, replace bolt {B) and cap (A). To examine the inside of the valve, unscrew thecap (A) and spring-bolt (F), so as to relieve thesprings tension, remove the set screws, and thedome (E) and case {G) may then be unscrewed andthe internal parts of the valve are exposed. STAR LOCOMOTIVE POP SAFETY VALVES. An efficient form of open or plain locomotive popsafety valve is shown in Figs. 2 and 3. As will beseen from the latter (the sectional view) the spring isencased in a chamber, thereby being protected fromthe escaping steam. The spring discs or seats, bothtop and bottom, are pivoted, in order to overcome all 228 LOCOMOTIVE APPLIANCES. liability of an imperfect bearing of the spring uponits

---

Size: 1133px × 2206px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bo, bookcentury1900, bookdecade1910, bookidscienceofrailway14kirk