. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . ve(Plate 14) are as follows : iB. Base 9. Cap for Plain Valve 2. Spring Case 10. Cap for Lever Valve 3B. Modified Muffler 11B. Improved AdjustingDome Ring 4. Valve 12B. Bolt for Locking and 5. Lower Spring But- Adjusting Ring ton for Relief 13B. Relief Lever Lever Valve 14. Relief Spindle 6. Lower Spring But- 15. Spring for Relief ton for Plain Valve Lever Spindle 7. Upper Spring Button 16. Valve Spring 8. Spring Bolt Description and Operation. Safety-valves ar
. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . ve(Plate 14) are as follows : iB. Base 9. Cap for Plain Valve 2. Spring Case 10. Cap for Lever Valve 3B. Modified Muffler 11B. Improved AdjustingDome Ring 4. Valve 12B. Bolt for Locking and 5. Lower Spring But- Adjusting Ring ton for Relief 13B. Relief Lever Lever Valve 14. Relief Spindle 6. Lower Spring But- 15. Spring for Relief ton for Plain Valve Lever Spindle 7. Upper Spring Button 16. Valve Spring 8. Spring Bolt Description and Operation. Safety-valves are usuallyplaced in the dome or capsen. Their purpose is to re-lieve any excessive pressure in the boiler, above the re-sistance at which they are set. When the pressure in theboiler exceeds the tension of regulating spring 16, itsvalve 4 is forced off its seat, allowing the steam to es-cape to the atmosphere, until such time as the surplusof pressure has escaped. Spring 16 will then force mainvalve 4 to its seat. The construction of the muffler safety-valve is so designed that it will reduce the noise of escap- SAFETY-VALVES. 79.
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Keywords: ., bookauthornationalcorrespondenc, bookcentury1900, bookdecade1900
