When it comes to precision-controlled, oxidation-free, and high-volume annealing processes, bell furnaces are the industry standard. Whether you’re annealing wires, tubes, or coils, the right bell furnace manufacturers India can significantly improve your product consistency, reduce scaling, and maximize throughput.
As a leading bell type annealing furnace manufacturing company India, we engineer and supply high-efficiency, atmosphere-controlled bell furnaces tailored for industrial annealing operations. This guide covers the design, operation, applications, and types of bell furnaces, helping you make the right procurement decision for your heat treatment needs.
Bell furnaces are commonly used for heat treating heavy loads in vertical position. Bell furnaces are used in various heat treatment process such as annealing, carburizing, hardening, tempering, although they can also be used for sintering processes at low temperatures, or for drying. Leading Bell furnace manufacturers in India for wire annealing, steel strips annealing, carburizing furnace, bright annealing furnace and bell type annealing furnace manufacturer.
The load/product is heated inside a mobile cover or dome, which can be removed using a traveling hoist. Alternatively, an automatic lifting mechanism can also be provided as per the customer requirements. Bell furnace manufacturers in India generally offer customized designed and sizes based on the heat treatment requirements of a customer.
A complete guide to various types of furnaces used in heat treatment processes.
The most common bell furnaces are the single stack and multistack types used for annealing coils of cold-rolled steel strip. In multistack bell furnaces, three to eight stacks, each of which has its own muffle for protection against the effects of the hot air and products of combustion, are mounted on a rectangular
stand under the heating dome.
Each stack is 3–5 m high and contains three to five coils with a total weight of up to 180 tons.
The dome is heated by gas or electrical resistance heaters. Upon completion of the heating process, the dome is transferred by crane to another stand and the products are left to cool under the muffles
on the first stand. Heat exchange under the muffle is intensified by forced circulation of controlled gas. Cooling is accelerated by wetting the muffle with water or blowing cold air over it.
The working principle of a bell furnace is that during treatment in a bell furnace the coils of strip are loose, with spaces between the coil loops so that the gas circulates between the loops and flows over the entire surface of the strip, which makes
possible thermochemical treatment and acceleration of heating and cooling.
MAAN GLOBAL INDUSTRIES is the leading bell furnace manufacturers in India offering temperatures ranging from 550°C up to 1,200°C.
What Is a Bell Furnace?
Table of Contents
A bell furnace (also called a hood-type furnace) consists of two main parts:
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A fixed base or hearth containing the load.
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A movable dome (bell or hood) that is lowered over the base to provide the heating or protective environment.
A high-quality bell furnace manufacturer for wire annealing, tube processing, or coil heat treatment designs these furnaces to ensure uniform heat distribution, minimize oxidation, and control atmosphere conditions.
Why Choose Bell Furnaces for Annealing?
Top bell furnace manufacturers India recommend bell furnaces for several key benefits:
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Uniform Heating: Ideal for tightly wound coils or dense wire bundles.
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Oxidation Prevention: Furnaces are designed for inert gas operation (Nitrogen, Hydrogen).
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Energy Efficiency: Heat recovery from hot bells and circulating blowers ensures low power consumption.
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Automation Friendly: Ideal for automated lifting, purging, and cycle programming.
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Flexibility: One bell can serve multiple bases in a carousel configuration.
As a trusted bell type annealing furnace manufacturing company India, we offer both single-bell and double-bell configurations.
Technical Specifications of a Bell Furnace
Here are the general technical specs offered by leading bell furnace manufacturers India:
| Parameter | Specification |
|---|---|
| Temperature Range | 400°C – 1100°C |
| Capacity | 250 kg to 30,000 kg |
| Atmosphere | Nitrogen, Hydrogen, Exothermic, Endothermic |
| Bell Movement | Hydraulic, Chain Pulley, or Motorized Rack |
| Control System | PLC + HMI or SCADA with automatic purge and soak cycle management |
| Heating Method | Electric or Gas-Fired (with radiant tubes or convective coils) |
| Applications | Wire coils, seamless tubes, steel strips, copper/aluminum coils |
Every bell type annealing furnace manufacturing company India tailors these specs to suit plant layout, material size, and production requirements.
Major Parts of a Bell Type Furnace are:
- base, diffuser and plenum and fan placed between base and diffuser.
- inner cover and inner jacket, the first component with the function of complete covering of the system.
- the second one for separating the charge area from the heated zone.
- cooling cover, which allows rapid cooling after annealing process.
Bell Furnace working Video
- Excellent heating efficiency due to sealing between furnace and base; furnace can of different sizes based on the requirement.
- Different bell lifting methods available, according to customer requirements and design.
- Bell furnaces offer an economical method of heat treatment when used with multiple bases.
- A bell furnace’s principal advantage is its simplicity, since not having any mechanism (such as a door or car), allied to its design principle, ensures a positive seal on the floor/base.
- Normally, a bell furnace can change position or base, with the goal being better productivity, since by having two bases it remains operational for longer. While one load is processed, the other will be cooling or loading/unloading, optimizing furnace use. Bell type annealing furnace is the most widely used in the wire drawing and coil manufacturing industry.
- Low maintenance system by not having mechanisms or moving parts in the furnace and that’s the uniqueness of bell furnace design. Maintenance is limited to the combustion and control equipment.
Types of Bell Type Furnaces and configurations offered by the leading Bell Furnace Manufacturers in India
Bell furnaces comes in electric heating, gas fired and oil fired configurations. Bell furnace manufacturers offer various heating sources depending on the application and customer requirements.
Steel Wire Annealing Bell Type Furnace
Effective loading space. Diameter 1,800 ~ 4,600mm; Height 1,800 ~ 4,000mm. Can customize-make for special size.
Heating source. Electricity or gas(LPG or LNG).
Protection atmosphere. The Nitrogen, cracked gas of ammonia or hydrogen.
Electrical control system. PC touch screen installed with professional heat treatment software, fully in-process control.
Atmosphere system. Oxygen probe or Oxygen/ hydrogen analyzer.
The Configuration options:
A. Standard configuration: Bell – type furnace + electrical control system + ammonia cracker + oxygen probe system.
B. High configuration: Bell-type furnace + electrical control system + Oxygen/ hydrogen analyzer.
C. Premium configuration: Bell – type furnace + electrical control system + ammonia cracker + hydrogen/Oxygen analyzer.
D. Full hydrogen configuration: Bell-type furnace + electrical control system + hydrogen generator + Oxygen/ hydrogen analyzer+ security control system.
Bell Type Electric Heat Treatment Furnace for Steel Strips
|
Name |
MGI Bell Type Furnace |
MGI 150 |
|
|
Rated power |
KW |
144 |
|
|
Rated voltage |
V |
415 |
|
|
Phase number |
|
3 |
|
|
Frequency |
HZ |
50 |
|
|
Temperature control area |
area |
2 |
|
|
Working temperature of inner cover |
ºC |
≤1050 |
|
|
Annealing temperature |
ºC |
450-950(adjustable) |
|
|
Temperature of furnace external |
ºC |
Indoor temperature +≤40 |
|
|
Furnace temperature uniformity |
ºC |
≤±5(Heat preservation stage) |
|
|
Working dimension |
mm |
Φ1000×2300 |
|
|
Effective loading diameter |
mm |
Φ980 |
|
|
Effective loading height |
mm |
2100 |
|
|
Max loading weight |
T |
≤4 |
|
|
Cooling cover |
Empty cold blast rate |
M3/h |
3200 |
|
Empty cold blast power |
KW |
1.5KW×2 |
|
|
Empty cold blast rotate speed |
r/min |
1500 |
|
|
Cooling water flow |
M3/h |
10 |
|
|
Furnace base |
Max loading |
T |
≤7 |
|
Heating fan power |
KW |
5.5 |
|
|
Heating fan rotate speed |
r/min |
740/1450 |
|
|
Diameter of blades |
mm |
Φ500 |
|
|
Inner cover |
Diameter |
mm |
Φ980 |
|
Max loading height |
mm |
2100 |
|
|
Max temperature |
ºC |
850 |
|
|
Max air pressure |
Pa |
9.5×103 |
|
|
Limiting vacuum |
Pa |
1×103 |
|
|
The requirement for protection gas: 1. safety gas: N2 99% 2. Ammonia decomposition gas: 7-10M3/h 3. Protect the gas purity requirement: O2≤3ppm ,NH3≤3ppm ,H2O≤-50ºCD.P |
|||
Bell Type Bright Annealing Furnace Manufacturer in Mumbai, Pune, Hyderabad, Delhi, Kolkata, Bengaluru
Specifications:
| Maximum temperature | 1200ºC |
| Working temperature | 1100ºC (continuous) |
| Heating rate | 0-10ºC/min |
Chamber size |
800*800*2100(W*L*H) |
| Temperature control | PID automatic control |
| Voltage | AC 415V 3Phase,50/60 Hz |
| Heating element | Kanthal A1 |
| Thermocouple | R-type |
Standard accessories |
Power Control Unit, Temperature Controller, Wiring |
| Warranty | One year standard warranty (Consumable parts such as processing tubes, o-rings and heating elements are not covered by the warranty.) |
Bell Furnace Manufacturer for Wire Annealing
Wire manufacturing industries require high precision and scale-free surface quality. As a leading bell furnace manufacturer for wire annealing, we engineer furnaces with:
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Horizontal or vertical coil stacking support.
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High convection rate for fast uniform heating.
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Controlled inert gas flow to avoid decarburization or discoloration.
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Programmable soaking and cooling profiles.
Our clients include manufacturers of stainless steel wire, spring wire, copper wire, and galvanized products. If you’re looking for the best bell furnace manufacturers India for wire heat treatment, our systems deliver unmatched repeatability and finish quality.
Bell Furnace for Tube Annealing
Annealing tubes requires deep and even heat penetration while protecting inner and outer surfaces. We are a specialized bell furnace manufacturer for tube annealing, providing:
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Custom fixtures to vertically or horizontally load tubes.
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Controlled ramp rates and holding temperatures to avoid collapse or oxidation.
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Hydrogen-compatible atmospheres for stainless steel tubing.
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Rapid cooling to meet metallurgical specs.
From small-diameter hypodermic tubes to large industrial heat exchanger tubes, our bell systems cater to exacting norms, making us a preferred bell type annealing furnace manufacturing company India for tube-based industries.
Bell Furnace for Coil Annealing
Coil annealing is common in steel, aluminum, and copper industries. As an established bell furnace for coil annealing supplier, we deliver:
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Multi-bell carousel systems for high-volume plants.
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Convective gas flow circulation for tight-wound coils.
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Automation for bell lifting and purge timing.
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Data logging and audit-ready temperature profiles.
Whether you’re treating HR/CR steel, copper strips, or aluminum coils, our systems help meet IS, ASTM, and DIN standards with ease, solidifying our position as top bell furnace manufacturers India.
Types of Annealing Furnaces
While bell furnaces are ideal for batch and protective-atmosphere annealing, other types offered by any good bell type annealing furnace manufacturing company India include:
| Furnace Type | Best For |
|---|---|
| Box Type Furnace | General purpose annealing and stress relief |
| Pit Type Furnace | Long shafts and vertical components |
| Continuous Belt Furnace | High-speed wire, fasteners, and pins |
| Rotary Hearth Furnace | Ring-type parts or automotive gears |
| Vacuum Annealing Furnace | Aerospace and medical-grade materials |
However, when it comes to oxidation-free surface treatment and high-volume production, the bell furnace remains unmatched, especially from a qualified bell furnace manufacturer for wire annealing or bell furnace for tube annealing.
How much is the cost of a Bell Furnace?
Bell furnace manufacturers in India offer Bell type furnaces based on customized design and setup that affects the pricing for each furnace. However, cost of a bell furnace starts at Rs. 12,00,000 lacs and goes upto Rs. 52,00,000 lacs.
Bell furnace is well suited for steel wires, steel strips, sintering processes and other metal heat treatment industries due to its high heating efficiency, low maintenance and robust design.
Applications & Industries Served
Our bell annealing systems are widely used by:
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Wire Drawing Plants (SS, MS, Copper wires)
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Tube Manufacturers (Seamless & Welded)
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Cold Rolling Mills (CR Coil Treatment)
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Transformer Core Manufacturers
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Fastener and Spring Makers
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Electrical Conductor Industries
As one of the fastest-growing bell furnace manufacturers India, we serve industries across Maharashtra, Tamil Nadu, Gujarat, Delhi NCR, Telangana, and Karnataka.
Key Deliverables from a Bell Type Annealing Furnace Manufacturing Company India
Here’s what we deliver as a professional bell type annealing furnace manufacturing company India:
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Control Panel with Alarm & Safety Interlocks
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SCADA-enabled Operation & Data Reporting
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Operator Training & Furnace Manual
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Annual Maintenance Contract (AMC)
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Spare Parts Stocking and Refractory Repair
We ensure your bell furnace for coil annealing or bell furnace for tube annealing is not just installed—but optimized for maximum efficiency.
Performance Benefits
Clients who partner with us as their preferred bell furnace manufacturers India enjoy:
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±5°C temperature uniformity across the load
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30–40% lower energy consumption with regenerative blowers
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99.95% process gas purity handling capability
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Quick batch changeover with automated lift system
These performance metrics help our clients scale faster while maintaining consistent metallurgical quality—why we’re a top bell type annealing furnace manufacturing company India.
Selection Tips for Buyers of bell furnace
When sourcing a bell furnace manufacturer for wire annealing or similar systems, consider:
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Material Type: SS, MS, Copper, Al
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Atmosphere Control: Nitrogen or Hydrogen-based
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Bell Size: Height and diameter vs. load shape
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Heating Source: Electric or Gas compatibility
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Cycle Time: Throughput per shift
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Support: Installation, AMC, Upgrades
The best bell furnace manufacturers India will offer a consultation-based proposal after understanding your production line and compliance requirements.
Export-Ready Systems
Our furnaces are exported to:
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UAE
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Kenya
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Uganda
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Saudi Arabia
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Ghana
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Egypt
With CE and ISO certification, we are a globally trusted bell type annealing furnace manufacturing company India with export-compliant packaging and manuals.
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If you are looking for Bell furnace Manufacturer in India or industrial oven manufacturer, Electric furnace or high temperature furnace, Muffle furnace, Conveyor Belt industrial furnace or Infrared conveyor oven in Mumbai, Delhi, Pune, Hyderabad, Kolkata, Bangalore, Chennai, India, then Call: 8882490101 or fill out the form on the right.
Contact the Most Trusted Bell Furnace Manufacturers India
Looking for a long-term bell furnace manufacturer for tube annealing or bell furnace for coil annealing?
MAAN GLOBAL INDUSTRIES offers rapid quotation support. Trust MAANGLOBAL INDUSTRIES as your next bell furnace manufacturers India and power your production line with efficiency and precision.
Conclusion
Bell furnaces offer unmatched atmosphere control, batch consistency, and adaptability for wire, tube, and coil annealing. As a dedicated bell type annealing furnace manufacturing company India, we combine engineering expertise, automation, and local service to help your business scale confidently. Whether you’re expanding or upgrading, partner with us—the preferred bell furnace manufacturer for wire annealing, bell furnace for tube annealing, and bell furnace for coil annealing across India’s industrial heartlands.
