Gas-Heated Furnace Used for Preheating Molds

Grieve’s No. 862 is a gas-heated 2,000°F (~1,093.3°C) furnace currently used for preheating molds.

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Grieve’s No. 862 is a gas-heated 2,000°F (~1,093.3°C) furnace currently used for preheating molds. The oven features 750,000 Btu/hr. installed in four modulating natural gas burners with a floor-mounted combustion air blower. Workspace dimensions are 36" × 48" × 36".

The unit has 7"-thick insulated walls comprised of 5" of 2,300°F ceramic fiber and 2" of block insulation. The 7" floor insulation contains 4 1/2" of 2,300°F firebrick and 2 1/2" 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.