THE FEED WATER 21 



To Start the "Penberthy" Injector. With pressure 

 under sixty-five pounds, the valve in the suction pipe should 

 be opened one turn, the steam valve may then be opened 

 wide. The injector will probably start off at once, but 

 should water run from the overflow, the suction valve 

 should be slowly throttled until it "picks up." If hot steam 

 and water issue from the overflow, the suction should be 

 opened wider. A little practice will enable one to set the 

 valve at any pressure, so that it is simply necessary to turn 

 on the steam to start the injector. At a pressure of sixty- 

 five pounds or over, the water supply valve may be opened 

 wide, but it is better partly to close it, as the injector will 

 deliver hotter water when the supply is throttled. The in- 

 jector must be regulated by the suction valve, and not by 

 attempting to regulate it by the steam valve. The "Pen- 

 berthy" admits of considerable steam variation. At thir- 

 ty-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 main passage way. The 

 jets may be coated with lime, and if so, they should be 



