. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . JOINTRING TO BOILER. W^M > s^wa a Plate 8 BOILER CHECK WITH STOP VALVE 66 BOILER CHECKS. 7). The lift of the check-valve should be in proportionto its diameter and the capacity of the injector, the liftvarying with the different sizes of injectors and check-valves. An additional or intermediate check-valve is used onsome classes of engines, which is located in the deliverypipe between the injector and the boiler check. The pur-pose of the intermediate checkr
. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . JOINTRING TO BOILER. W^M > s^wa a Plate 8 BOILER CHECK WITH STOP VALVE 66 BOILER CHECKS. 7). The lift of the check-valve should be in proportionto its diameter and the capacity of the injector, the liftvarying with the different sizes of injectors and check-valves. An additional or intermediate check-valve is used onsome classes of engines, which is located in the deliverypipe between the injector and the boiler check. The pur-pose of the intermediate checkrvalve is to prevent aleakage past the check-valve from reaching the injectorand causing it to heat. How to Reseat a Boiler Check. The frost cockshould be opened, which will allow the pressure fromthe boiler which passes the check-valve into the deliv-ery pipe to escape, instead of passing back throughthe injector. The cage should be tapped lightly onthe under side, which will assist in reseating the should be taken when tapping the check-valvethat the blow Avill not be sufficient to dent or springthe cage in which the check-valve operates
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