. Science of railways . an. The steam nozzle isthe life of an injector, and should be maintained inbest condition. If the injector is new and the liftingnozzle should fill up, remove from body as previouslydescribed and push a piece of card-board downthrough the annular nozzle, so as to drive out thedirt; it will probably not be necessary to take thenozzles apart. (3) When grinding the steam valve, screw thesteam stuffing box rather tightly against its shoulderto insure its proper alignment, after placing a rubberwasher over the holes leading to the lifting nozzle toprevent the sand from worki
. Science of railways . an. The steam nozzle isthe life of an injector, and should be maintained inbest condition. If the injector is new and the liftingnozzle should fill up, remove from body as previouslydescribed and push a piece of card-board downthrough the annular nozzle, so as to drive out thedirt; it will probably not be necessary to take thenozzles apart. (3) When grinding the steam valve, screw thesteam stuffing box rather tightly against its shoulderto insure its proper alignment, after placing a rubberwasher over the holes leading to the lifting nozzle toprevent the sand from working into the lifting jet;this washer should, of course, be provided with a holelarge enough to admit the plug on the end of thespindle. Keep the steam valve perfectly tight. (4) To remove lime and scale, immerse the tubes 252 LOCOMOTIVE APPLIANCES. or the whole iniector in a bath composed of tenparts of water to one part muriatic acid. Eemoveas soon as scale is dissolved. (5) It is essential that the tubes and nozzles be. Fig. Class K Self-Acting Injector, Non-Lifting. maintained in good condition, and that the propor-tions be correct, in order to obtain the best resultsfrom an injector. The body of this injector willlast a lifetime, but the tubes require occasional LOCOMOTIVE APPLIANCES. 253 replacing. As these can now be purchased or madeat a very low cost, it is not good policy to allow thecondition of the injector to run down. SELLERS SELF-ACTING INJECTOR CLASS K—NON-LIFTING. The Sellers Self-Acting Injector, known as*^ Class K, which is Non-Lifting, embodies all theadvantageous features of the lifting forms, but isdesigned to receive the water supply under a head,and should be placed below the running-board ofthe locomotive. The manufacturers claim that thisClass K injector overcomes all the serious objec-tions urg^d against the older forms of non-liftinginjectors. This form is shown by a general view in Fig. 3and by sectional view in Fig. 4. It is applicable to
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