Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure 254 TFigure 255 Boiler fittings—stop and check Boiler fittings. pull on the end which is so frequent with unbalancedvalves. Nearly all boilers are now fitted up with safety plugsin the crown sheet. They are made of composition whichmelts at a temperature somewhere around 500 degreesFahrenheit. An outside type of one of these plugs is. Figure 256Blower valve. Figure 257Whistle valve. seen in Fig. 258. T is a taper tap which taps directly in-to the sheet. M is the composition
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure 254 TFigure 255 Boiler fittings—stop and check Boiler fittings. pull on the end which is so frequent with unbalancedvalves. Nearly all boilers are now fitted up with safety plugsin the crown sheet. They are made of composition whichmelts at a temperature somewhere around 500 degreesFahrenheit. An outside type of one of these plugs is. Figure 256Blower valve. Figure 257Whistle valve. seen in Fig. 258. T is a taper tap which taps directly in-to the sheet. M is the composition metal. The innersurface of this plug is tinned and the metal M is sweatedin solid so that the core does not need to be calked tomake it tight. Fig- 259 represents an inside type. Hexagonal268 Boiler fittings. heads are provided for screwing them into place. Onaccount of the great accumulation of mud in the waterspace, several blow off cocks, Fig. 260, are usually speci-fied. The taper tap T enters either directly into thesheet or else is tapped into a flange which in turn isriveted to the boiler. The central portion is tapered at M 1 p Outside TypeFigure 258
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
