Indirect Fired Tunnel Oven

Indirect Fired Tunnel Oven for Biscuit Production Line

In the biscuit and other flour-based product manufacturing industry, the quality of the baking process has a direct impact on the taste, texture, color, shelf life, and final quality of the product.

Selecting the right baking system not only improves product quality but also increases production line efficiency, reduces energy consumption, and minimizes production waste.

An indirect fired tunnel oven is one of the most advanced baking systems in the food industry. By using indirect heat transfer technology, this oven provides fully controlled baking conditions for producing various types of biscuits, crackers, cookies, and other flour-based products.

In this type of oven, the burner flames do not come into direct contact with the product. Heat is transferred into the baking chamber through radiant tubes or heat exchangers.

This method ensures uniform heat distribution, precise temperature control in each section, and prevents unwanted changes in product quality.

For this reason, many large food factories use indirect fired tunnel ovens to produce high-quality and export-oriented products.

Ettehad Novavaran Company, relying on technical knowledge, experience, and high-quality industrial components, designs and manufactures various indirect fired tunnel ovens according to production capacity, factory space, and product type.

All machines are manufactured with customized designs to provide the best performance for customers in biscuit production lines.

 

What is an Indirect Fired Tunnel Oven?

An indirect fired tunnel oven is an industrial baking machine designed for continuous baking of food products. In this system, heat is transferred into the baking chamber without direct flame contact with the product.

In this type of oven, burners are installed in a separate combustion chamber, and thermal energy is transferred into the oven chamber through radiant tubes or heat exchangers.

After leaving the moulding machine or cutter, products enter the oven on a heat-resistant conveyor belt and pass through several heating zones to complete different baking stages.

Independent temperature control in each zone ensures that dough setting, moisture evaporation, color development, and final baking are performed with very high accuracy.

 

How Does an Indirect Fired Tunnel Oven Work?

At the beginning of the production line, dough is shaped by a moulding machine or cutter and placed on a special conveyor belt.

The products then enter the tunnel oven and pass through several heating zones along the production path.

Each zone applies a specific temperature to ensure that the baking process is carried out gradually and under precise control.

Since the flame does not directly contact the product, the possibility of surface burning, unwanted color changes, or combustion odors is minimized.

This feature results in products with uniform color, proper texture, and stable quality, which is especially important for export products.

 

Advantages of Using an Indirect Fired Tunnel Oven

Using an indirect fired tunnel oven provides numerous advantages for food industry manufacturers, including:

• Completely uniform baking across the entire width and length of the product.
• Precise temperature control in each heating zone.
• Prevention of direct flame contact with the product.
• Maintaining the natural quality, color, and taste of biscuits.
• Reduction of production waste.
• Optimized energy consumption through the use of standard thermal insulation systems.
• Ability to produce different types of biscuits, crackers, and cookies.
• Adjustable conveyor speed according to baking time requirements.
• Increasing production capacity and improving production line efficiency.
• Reducing maintenance costs in the long term.

 

Applications of Indirect Fired Tunnel Oven

This oven is used in food industry factories for producing various products, including:

• Different types of plain and cream-filled biscuits.
• Whole wheat biscuits.
• Crackers.
• Cookies.
• Wafers.
• Industrial dry bread products.
• Export-quality flour-based products.

Due to its high baking quality, this type of oven is an ideal choice for production units where product consistency and uniform quality are among the top priorities.

 

Indirect Fired Tunnel Oven Price

The price of an indirect fired tunnel oven depends on various factors due to its customized design and adaptation to each factory’s requirements.

The most important factors affecting the price include:

• Production capacity.
• Oven length and width.
• Number of heating zones.
• Burner type.
• PLC control system.
• Oven body material.
• Conveyor belt type.
• Additional equipment and customization options.

Therefore, it is not possible to provide a fixed price for this machine, and each project is priced after evaluating technical requirements and production line conditions.

Ettehad Novavaran Company designs and manufactures different types of indirect fired tunnel ovens according to modern food industry standards, providing the best solution based on your production capacity and factory space.

Using high-quality components, advanced control systems, and precise engineering increases production efficiency, reduces energy consumption, and extends the service life of the machine.

 

Buying an Indirect Fired Tunnel Oven from Ettehad Novavaran

If you are planning to purchase an indirect fired tunnel oven for a biscuit, cracker, cookie, or other flour-based product production line, the experts at Ettehad Novavaran are ready to provide specialized consultation, customized design, and manufacturing of equipment according to your factory requirements.

Advantages of choosing Ettehad Novavaran:

• Customized design and manufacturing according to production capacity.
• Use of stainless steel and high-quality industrial components.
• Precise temperature control through PLC and HMI systems.
• Installation, commissioning, and operator training.
• Reliable warranty and after-sales services.
• Supply of spare parts and technical support.

For free consultation, price inquiry, and order registration, you can contact Ettehad Novavaran sales experts through WhatsApp, Telegram, and Rubika.

You can also visit:

etehadnoavaran.com

Our technical team will evaluate your production line requirements and provide the most suitable solution for improving baking quality and factory productivity.

 

Frequently Asked Questions

 

1. What is an indirect fired tunnel oven?

An indirect fired tunnel oven is an advanced food industry baking system that performs the baking process by transferring heat through heat exchangers or radiant tubes without direct flame contact with the product.

This method provides uniform baking and helps maintain consistent product quality.

 

2. What products are suitable for an indirect fired tunnel oven?

This oven is suitable for baking various products, including:

• Biscuits.
• Crackers.
• Cookies.
• Wafers.
• Dry bread products.
• Flour-based products.
• Other food products requiring precise temperature control.

 

3. What is the difference between an indirect fired tunnel oven and a direct fired tunnel oven?

In an indirect fired tunnel oven, the burner flame does not directly contact the product, and heat is transferred indirectly.

This feature provides more uniform baking, better temperature control, and reduces the possibility of unwanted color changes or product burning.

 

4. Can the temperature of each oven section be adjusted separately?

Yes. Indirect fired tunnel ovens are equipped with PLC control systems, allowing each heating zone temperature to be adjusted and controlled independently.

 

5. What is the length of an indirect fired tunnel oven?

The oven length depends on production capacity and factory space. It is usually designed and manufactured between 20 and 60 meters.

Customized dimensions are also available according to customer requirements.

 

6. What factors affect the price of an indirect fired tunnel oven?

The most important factors affecting the price include:

• Oven length and width.
• Production capacity.
• Number of heating zones.
• Burner type.
• Control system.
• Material quality.
• Component brands.
• Customization options.

 

7. What advantages does an indirect fired tunnel oven have compared to other baking systems?

The most important advantages of an indirect fired tunnel oven include:

• Uniform baking.
• Precise temperature control.
• Prevention of direct flame contact with the product.
• Reduction of production waste.
• Optimized energy consumption.
• Improvement of final product quality.
• High durability and long service life.

 

8. Is it possible to manufacture an indirect fired tunnel oven as a customized machine?

Yes. Ettehad Novavaran designs and manufactures indirect fired tunnel ovens completely customized according to production capacity, product type, factory space, and the technical requirements of each customer.

 

9. What type of fuel does an indirect fired tunnel oven use?

This machine usually operates using natural gas or liquefied petroleum gas (LPG).

The fuel type is selected based on factory conditions, available energy sources, and customer requirements.