Recirculating ovens equipped with an alloy muffle for use with a positive flow of inert atmosphere. Available at operating temperatures of 1200°F(42), 1400°F(44), 1600°F(46) and 1800°F(49) for tempering, drawing, annealing and preheating steel, aluminum, glass and ceramics. Ideal for batch oven processes. The muffle separates the chamber refractory and heating elements from the workload and atmosphere to minimize scale and oxidation on most tool steels. This design achieves lower dew points, reduces atmosphere consumption and shortens purge time. The AM models are ideal for cyclical or production type applications.

The 4000 AM models are designed with a fan assembly mounted through the rear wall of the chamber which recirculates the air flow around the outside of the muffle. These models are rated for work loads up to 25 lbs/sq ft of hearth area. The larger 4055 AM models are equipped with the fan mounted through door, recirculating the atmosphere and heat inside the work area. These models are rated for work loads up to 50 lbs/sq ft of hearth area.

All models are completely wired, test fired and shipped ready for connection to main power and regulated atmosphere pressure of 5 PSI. All models will operate with inert atmosphere.

Standard Features

• Welded sheet metal shell construction with structural reinforcement.
• Heavy gauge coil wound low watt density heating elements for longer life.
• High grade flat wall and corrugated alloy muffles with inlet pipe and front flange.
• Multi-layered energy efficient lightweight firebrick and mineral block insulation for maximum heat storage and minimum heat loss.
• Elements mounted in easy-to-replace holders located on side walls and below the hearth for uniform temperature.
• Silicon carbide hearth plate for full muffle support and thermal transfer from floor elements on 4055 AM models.
• Stainless steel fan with motor and belt drive.
• Double-pivot horizontal swing door with high temperature ceramic fiber gasket, swing bolts and handles for sealing against muffle flange.
• Honeywell digital temperature controller with type K thermocouple and contactor.
• Controls are mounted in separate side mounted NEMA 1 panel and operate on 115 volts.

Options

Flow meters, regulators, oxygen analyzers, dew point indicators, muffle thermocouples, cascade and multi-zone control systems, door curtains, program controllers, over temperature safety systems, cooling systems, timers, recorders, quench tanks, alternate door arrangements, computer interface, special voltages, gloves and tongs.

4000 AM

4055 AM

Downloads

• Series 4000 AM Atmsophere Alloy Muffle Ovens