. Railway mechanical engineer . rance and the Knorr to German),Holland and Switzerland. The Weir System The Weir .system of feedwater heating consists of a double-acting .steam feed pump which takes the water cold fromthe tender through the pipe E forcing it through the into the boiler through the discharge pipe G as shown in Fig. 1. The pump is of a vertical type and is of a designlargely used in marine service. The heater is shown dia-grammatically in Fig. 2. It consists of a bundle of tubesof solid drawTi copper expanded into tube plates E of rolledbrass. These tube plates are fix
. Railway mechanical engineer . rance and the Knorr to German),Holland and Switzerland. The Weir System The Weir .system of feedwater heating consists of a double-acting .steam feed pump which takes the water cold fromthe tender through the pipe E forcing it through the into the boiler through the discharge pipe G as shown in Fig. 1. The pump is of a vertical type and is of a designlargely used in marine service. The heater is shown dia-grammatically in Fig. 2. It consists of a bundle of tubesof solid drawTi copper expanded into tube plates E of rolledbrass. These tube plates are fixed to the ends of a mildsteel shell by collar bolts which also carr\- the end coversof the heater. The covers contain dividing ribs which causethe feed water to flow from end to end of the heater, makingfour The exhaust .steam from the cylinders entersthe heater at B and from the pump at C. Thus it will beseen that the exjiaust steam surrounds the tubes and with Exhaust Steam InletsFrom Cylinder-s From Pump Feed Outlet. Feed Inlet Fig. 2—Weir Locomotive Feedwater Heater tile feed puinj) between the heater and the tank the heateris subjected to boiler pressure. The Caille-Potonie System The Caille-Potonie system is of the open type, the waterflowing from the tank to the feed water heater by gravity,a hot water pump Ijeing used to take the heated water fromthe heater and pump it into the boiler. A diagrammatic out- 569 570 RAILWAY MECHANICAL ENGINEER Vol. 94, No. 9 line of a recent installation is shown in Fig. 3. The waterfrom the tender passes through the pipe .1/ to the Y fittingP which delivers the water to the top and bottom of theheater. The heated water is taken off at / passing throughthe pipe Q to the pump S. From there it passes throughthe pipe jT to a check valve and into the boiler. The exhaust steam for heating the feed water is takenfrom the exhaust nozzle A passing through the pipe C to theheater. The exliaust from the feed pump also passes to theheater
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
