THE FEED WATER. 



STEAM 



when the supply is throttled. The injector must be regulated 

 by the suction valve, and not by attempting to regulate it by 

 the steam valve. The "Penberthy" admits of considerable 

 steam variation. At thirty-five pounds steam pressure, the 

 valve in suction may be opened as wide as it will stand and 

 steam can rise to over one hundred pounds without further 

 adjusting. 



What to do when the Injector Fails to Work. See that 

 the suction hose and connections are tight. The delivery 

 pipe may be "limed up" where it enters the boiler. A leaky 

 check valve will keep the injector so hot as to prevent it 

 from "picking up" water. Dirt may be lodged in the 



chamber where jets "R" and 

 "S" meet, or in the jet "Y," 

 the drill holes or the nvun 

 passage way. The jets may 

 be coated with lime, and if 

 so, they should be soaked in 

 a solution composed of one 

 part of muriatic acid to ten 

 parts of water. Occasionally 

 soak the whole injector. Do 

 not expect an injector to 

 work well, especially at high 

 FIG. 2. pressure, if the tank be full 



SECTIONAL VIEW OF INJECTOR, of dirt and rubbish. Some- 

 times an injector will work well for a long time, and then 

 begin to drizzle at the overflow under the same pressures 



