Model AL Pot Furnaces Electrically Heated "Workhorse" for Industrial Applications Model AL Furnaces using molten salt or lead are ideal for many applications. Tools and parts heat quickly in the liquid bath making possible unexpectedly high rates of production from these small furnaces. The surface protection provided by the salts and lead during the heat treatment results in consistent high quality. Selective heating of many parts can be done by partial immersion. Surface hardening treatments are easily accomplished in this simple inexpensive equipment. Typical tool room applications within the 1650°F temperature range include stress relieving, hardening, tempering, austempering, martempering, carburizing, cyaniding and nitriding.

Among the many other possible applications are annealing of gold and copper alloys, heat treatment and brazing of aluminum alloys, descaling of stainless steel, de-enameling of porcelain enamel ware, stripping plastic from plastic molding and extrusion dies and melting of soft metals. The Model AL Pot Furnaces are truly real "workhorses". Trays.

Features:

• Clean, safe, quiet operation and best possible working conditions result from use of the electric heat
• Uniform pot heating without hot spots is assured by the carefully engineered heating elements and furnace chamber
• High temperature uniformity and repetitive quality heat treating is produced by rapid conductive and convective heat transfer in the liquid bath
• Quick temperature recovery and maximum production is provided by the ample power rating
• Trouble free operation results from the heavy industrial construction
• Long life heavy weight nickel chromium heating elements are designed to permit quick, simple replacement
• Maximum thermal efficiency and long life are assured by the high grade insulation that is used throughout
• Economy during the furnace idling period is provided by a highly insulated, lightweight, lift-off cover
• The heating elements are protected and a means is provided to clear the chamber of molten salt or lead by tapering the furnace floor to a bottom drain hole.

Standard Equipment:

The Size O Model AL Furnace utilizes a helical wound nickel chromium heavy gauge wire heating element hanging vertically on insulators on an alloy frame.

Sinuous wound nickel chromium ribbon Heating Elements operating on 191 Volts, hang from the sidewalls of the chamber in the Size 1 and 2 Furnaces. A separately mounted auto type transformer to permit direct connection to a 220 Volts, 60 Cycles, Single Phase supply is standard equipment.

The Size 3 uses three separate sinuous wound ribbon elements which are Y connected for direct operation on a 220 volts 3-phase supply.

In Model AL Furnaces, the temperature is controlled by a thermocouple in the liquid bath. These furnaces are drilled to accept a second thermocouple in the heating chamber. A dual control arrangement is recommended.

Optional Equipment:

Optional equipment includes all types and makes of automatic temperature control equipment. On-off type control utilizing a magnetic contactor is suitable for most applications. Use of a current input regulator is desirable to limit the rate of melting of frozen baths and improve control at low operating temperatures. Transformers are required for connection to alternate voltage power supplies.

Custom Designs:

Pots are available in various shapes of formed, fabricated and cast materials. Special pot coatings are also available and the user should consult Sentry regarding their specific application.