Bell Furnace
“ELMAN HAS BEEN DESIGNING, ENGINEERING AND MANUFACTURING INDUSTRIAL FURNACE AND HEAT TREATMENT EQUIPMENT FOR 15 YEARS”
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Bell Furnace by elman
Bell furnaces are removable retort type furnace which is lowered over the load and hearth. The inner retort is placed over the loaded hearth sealed at the bottom and provided with a constant protective atmosphere. The outer heating shell is then lowered over the assembly.
A bell furnace with an outer heating shell holds several retorts. In case of dense hearth loadings, a motor-driven fan for circulating the atmosphere inside the retort provides more rapid uniform heating.
The workload is placed on an elevated refractory metal hearth that rests on an insulated base clad with an alloy plate material. A water-cooled circumferential flange and vacuum gasket are located on the vacuum-tight base cover adjacent to the heated zone.
A retort made with heavy walled heat-resisting alloys covers the workload. A flange at the bottom of the retort fits on top of the base gasket to provide a vacuum-tight enclosure. The bell-shaped furnace equipped with internal electrical heating elements is lowered into position over the retort by a vertical hoist.
The vacuum pumping system is connected through the insulated base since this furnace cannot be heated or cooled rapidly even after rooming the bell-shaped vessel. The production rates and the number of thermal cycles within a given time period are limited. The hot retort will support the entire pressure of the external atmosphere for the wall being heavy. The operating temperature of these furnaces is limited to 925 °C.
Bell Furnaces give you flexible, efficient performance in a variety of heat-treating applications. The fast heating rate, heavy load capacity, and reliable operation help you achieve fast turnaround and high productivity. The furnace is very simple and economical to operate, and is available in a wide range of sizes.
The applications range up to 1200°C, with endothermic, exothermic, or nitrogen atmospheres. This furnace enables you to handle various heat treatment applications efficiently and economically. This Furnace is differ from shuttle kiln type furnace . Bell is vertical lifting and lowering type with good sealing. Lifting and Lowering is by electro mechanical system with Gear motor and counter balance system.
Material is loaded on car hearth. Material Charging and discharging by manually systems. Furnace Temperature control automatically by Temperature Programmer, PID Temperature Controller.
Car Bell Type Furnace is suitable in operation, loading, unloading and proper sealing and energy efficient compare to shuttle kiln furnace.
Specification
| Title | Description |
|---|---|
| Temperature | Up to 950°C |
| Standard Applications | Wire annealing, Annealing, Isothermal Annealing, Brazing, Sintering, Vacuum Hardening, Vacuum Stress Relieving, Vacuum Tempering, Laboratory Applications |
| Insulation | Ceramic Fibre Blanket & Module / Refractory Brick Lining |
| Heating Media Options | Electric/Gas Fired/Oil Fired |
| Heating Element | Nichrome( 80/20) / Special Alloy Resistance Heating Wire /A1-Kanthal |
| Furnace classification | Class 2/Class 3 |
| Instrument option | Thyristor, Programmable Temperature Controller, Temperature Recorder, HMI |
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- Bell furnaces offer an economical method of heat treatment when used with multiple bases.
- Normally, a bell furnace can change position or base, with the goal being better productivity.
- Low maintenance system by not having mechanisms or moving parts in the furnace.
- Maintenance is limited to the combustion and control equipment.
- Tempering.
- Normalizing.
- Bell Annealing furnace.
- Malleabilization of cast iron.
- Low watt-density elements for long life.
- Easy-loading chamber.
- Complete, pre-wired free standing control panel with disconnect switch.
- SCR power control.
- Ceramic fiber block insulation reduces power consumption and boosts your productivity and efficiency with faster thermal cycling and reduced heat loss.Guide posts to ensure proper alignment of heating bell on base Optional.
- carbon control with oxygen probe.
Why choose elman?
- Custom designs offering the uniformity required for the types of processes involved.
- Designed to comply with AMS 2750E, with a temperature tolerance capacity of up to Class 1 if necessary.
- Flexible designs in a single unit to meet temperature uniformity studies (TUS) from 950°F (510°C) to 2,100°F (1,150°C).
- Pulse firing combustion systems.
- Low thermal mass insulation system, without any metal hardware exposed on the furnace hot face.
- Advanced heat recovery systems with recuperative burners offering fuel savings from 10% to 50% compared to cold air systems.
- Fiber lined sections using our patented Jointless system with a special design to compensate for fiber shrinkage, thereby significantly reducing maintenance.
