. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . nd giving up the train. Disconnected Tank Valve. A tank valve whichmay become disconnected closed can usually be openedor displaced by closing the heater valve and giving 64 BOILER CHECKS. the steam throttle in the injector a full opening,which will allow the steam to force its way backthrough the feed pipe and hose to the under side ofthe valve, forcing the valve from its seat. BOILER CHECKS. Purpose of the Boiler Check. The purpose of theboiler check is to pr

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. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . nd giving up the train. Disconnected Tank Valve. A tank valve whichmay become disconnected closed can usually be openedor displaced by closing the heater valve and giving 64 BOILER CHECKS. the steam throttle in the injector a full opening,which will allow the steam to force its way backthrough the feed pipe and hose to the under side ofthe valve, forcing the valve from its seat. BOILER CHECKS. Purpose of the Boiler Check. The purpose of theboiler check is to pr Stock Photo
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. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . nd giving up the train. Disconnected Tank Valve. A tank valve whichmay become disconnected closed can usually be openedor displaced by closing the heater valve and giving 64 BOILER CHECKS. the steam throttle in the injector a full opening,which will allow the steam to force its way backthrough the feed pipe and hose to the under side ofthe valve, forcing the valve from its seat. BOILER CHECKS. Purpose of the Boiler Check. The purpose of theboiler check is to pr
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. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . nd giving up the train. Disconnected Tank Valve. A tank valve whichmay become disconnected closed can usually be openedor displaced by closing the heater valve and giving 64 BOILER CHECKS. the steam throttle in the injector a full opening,which will allow the steam to force its way backthrough the feed pipe and hose to the under side ofthe valve, forcing the valve from its seat. BOILER CHECKS. Purpose of the Boiler Check. The purpose of theboiler check is to prevent a return flow of water fromthe boiler when the injector is not in use. This valve isautomatically closed when the injector is shut off, by thepressure from the boiler acting upon its upper surface.Careful attention should be given to the boiler check, asno type of injector will work in a satisfactory mannerunless the boiler check is given the necessary opening.The boiler check should make a good tight joint on itsseat at all times to prevent the water from flowing backinto the injector, which in many instances causes it to. O Plate 7 ANGLE BOILER CHECK—FLANGED fail. The boiler check is extremely simple in its con-struction and with a little care and attention can be keptin perfect working condition. The type of checks incommon use is usually provided with three or more lugsor wings, which are cast to the valve below its seat (Plate BOILER CHECKS. 6s 7). The purpose of these lugs or wings is to assist inreseating the valve centrally by acting as guides. Theselugs or wings should not be fitted in the casing tooloosely, as they are liable to become corroded and causethe valve to stick. In some of the improved types ofcheck-valves these lugs are cast fan-shaped, or inclinedfrom their seats, which creates a revolving check (Plate

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