Canadian foundryman (1917) . dust catcher areclosed during- a shut down; if any airgets into the mains there is always achance of an explosion. Whatever waythe blower tells you to handle the topbleeder, whether to keep it open or shutduring a shutdown, always follow his or-der to the word. Many serious furnaceaccidents are caused by operating bleed-ers and gas valves other than in the wayordered. The least change from ordeismay cause a terrific explosion. If thegas is wild in drafting it back in onestove at a shutdown, draft back througlan additional stove at once. Keep away from the dust legs
Canadian foundryman (1917) . dust catcher areclosed during- a shut down; if any airgets into the mains there is always achance of an explosion. Whatever waythe blower tells you to handle the topbleeder, whether to keep it open or shutduring a shutdown, always follow his or-der to the word. Many serious furnaceaccidents are caused by operating bleed-ers and gas valves other than in the wayordered. The least change from ordeismay cause a terrific explosion. If thegas is wild in drafting it back in onestove at a shutdown, draft back througlan additional stove at once. Keep away from the dust legs andmanhole covers on gas mains, from gasburners and air inlet doors, when thefurnace is sticking and liable to slip. Becareful when you open an air door to seehow the gas is burning; if too much gasis turned on, or if the eheckerwork isdirty, the gas may flash back into yourface. Keep and warn others away fromthese places; no one should handle burn-ers, doors, or valves unless directed bythe stove tender. Do not tighten any. FIG. 18. SAFE WAY TOHelper Is using shovel and standing away let the blast slam the chimney valve intoplace; set the valves easily by the cold-blast valve slowly to avoidracing the blowing engines. In case of the blast stopping unex- STOP TAPPING HOLE. from the trough and the tapping hole. thumb or other nuts on doors or blow-offvalves when the stove is on blast; youmay be killed or injured by the boltbreaking. Watch the water ott the hot-blast valve and seat, because water leak- CA N A l> I A N FO I N l> K Y M A N ing into the stove may cause the furnaceto slip or i^ot eoW; it will then be moredangerous. Report any jas leaks aboulthe burners or mains; do not let themleak unnecessarily. When the millwrightis i gamining the chimney valve for leaksdo not change the stove from blast toaras. When the hot-blast valveand seatarc being inspected be sure the chimneyvalve is kept open and the j*as turned off. The Stove Cleaners Before entering a sto
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