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Grieve
August 6, 2012
Gas-Heated Furnace
No. 862 is a gas-heated 2000°F furnace used for
preheating molds. Workspace dimensions are 36 inches wide x 48 inches deep x 36
inches high, and 750,000 BTU/hour are installed in four modulating natural gas
burners with a floor-mounted combustion air blower. The unit has 7-inch-thick
insulated walls, comprising 5 inches of 2300°F ceramic fiber and 2 inches of
block insulation. The 7-inch floor insulation contains 4 ½ inches of 2300°F
firebrick and 2 ½ inches of block
insulation. Controls onboard No. 862
include an automatic door switch to drive burners to low fire when the door is opened and an air-operated vertical lift
door.
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