L&L Special Furnace Delivers a Box Furnace

L&L Special Furnace has delivered a highly uniform box furnace to a distributor of equipment to maintenance repair and overhaul (MRO) facilities located throughout the world. The L&L Model XLB124 has working dimensions of 11” wide by 10” high by 22” deep. The furnace is capable of heat-treating a wide variety of tool steels – from D-2 to high-speed M-2 tool steel, along with low-temperature tempering. It is equipped with a sealed case for inert atmosphere capability, as well as a fully functional atmosphere control panel with pressure regulator, flowmeter and manual shut-off valve.

Elements are very evenly spaced around the chamber. There is a manually operated, spring-assisted vertical door. Included is a NEMA 1 control cabinet with a Eurotherm program controller, high-limit backup system, thermocouples, fusing, and all interconnection wiring. Power control is accomplished with quiet two-zone, long- lasting solid-state contactors. The furnace hearth is a rugged cordierite plate with ceramic support.

The Model XLB124 is insulated with 2-1/2” lightweight firebrick and backed up with 2” of insulating board. The bottom is reinforced with a high-density calcium silicate that provides extra support for the load weight.

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