Insulated Tunnel Housing for Controlled Cooling Tunnels

Product Specifications

Technical details and manufacturing context for Insulated Tunnel Housing

Definition

The Insulated Tunnel Housing is a critical component of the Controlled Cooling Tunnel system, serving as the protective outer shell that maintains consistent low temperatures within the tunnel by minimizing heat transfer from the external environment. It ensures energy efficiency and precise temperature control during product cooling processes. Constructed from insulated steel panels with polyurethane foam core and stainless steel cladding, the housing creates a sealed, insulated barrier around the cooling tunnel using materials with low thermal conductivity. This prevents ambient heat from entering the tunnel and maintains the controlled cooling environment required for consistent product processing. The housing is available in modular sections, with internal widths ranging from 600 to 2000 mm, internal heights from 400 to 1500 mm, and section lengths from 1000 to 6000 mm. Insulation thickness varies from 50 to 150 mm, with thermal conductivity between 0.020 and 0.040 W/(m·K). The maximum operating temperature is 80 to 200 °C, while the surface temperature is limited to ≤40 °C to prevent burns. Air leakage rate is ≤1.5%, and the IP rating ranges from IP54 to IP65. Panel material is SUS304 stainless steel, and insulation material is PIR (polyisocyanurate), which offers better fire resistance than EPS. Weight per section ranges from 150 to 800 kg. These parameters are directory reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. Standards such as GB/T 4272, GB/T 10294, GB/T 14295, ASTM A240, GB/T 21558, and IEC 60529 are referenced for verification and procurement purposes, but do not imply certification or compliance. The housing is designed for easy assembly and maintenance, with modular sections that facilitate installation and access. It is suitable for food and chemical environments due to its corrosion-resistant materials. Proper selection requires consideration of product clearance, conveyor height, and thermal performance requirements. Maintenance signals include increased surface temperature, visible damage to panels, or air leakage, which may indicate insulation degradation or seal failure. The housing is not a standalone product but a component of a larger cooling system, and its performance depends on proper integration with the tunnel and cooling equipment.

Working Principle

The housing creates a sealed, insulated barrier around the cooling tunnel using materials with low thermal conductivity. This prevents ambient heat from entering the tunnel and maintains the controlled cooling environment required for consistent product processing. The polyurethane foam core provides thermal resistance, while the stainless steel cladding offers mechanical protection and corrosion resistance. The modular design allows for flexible configuration and easy access for maintenance. The insulation thickness and thermal conductivity directly affect the housing's ability to minimize heat transfer, and the air leakage rate influences cooling efficiency. The surface temperature is kept low to ensure safety, and the IP rating protects against dust and water jets. The housing's performance is verified through standards such as GB/T 4272 for insulation and GB/T 14295 for air leakage, but actual compliance must be confirmed with the manufacturer.

Common Materials

Insulated steel panels, Polyurethane foam, Stainless steel cladding

Technical Parameters

Parameter	Typical range	Notes & selection driver
Internal Width	600–2000 mm	Determines product clearance and insulation thickness
Internal Height	400–1500 mm	Must accommodate conveyor and product height
Section Length	1000–6000 mm	Modular sections for easy assembly and maintenance
Insulation Thickness	50–150 mm	Thicker reduces heat loss but increases footprintGB/T 4272
Thermal Conductivity	0.020–0.040 W/(m·K)	Lower is better for insulation performanceGB/T 10294
Max Operating Temperature	80–200 °C	Limited by seal and insulation material
Surface Temperature	≤40 °C	Safety requirement to prevent burnsGB/T 4272
Air Leakage Rate	≤1.5 %	Higher leakage reduces cooling efficiencyGB/T 14295
Panel Material	SUS304	Corrosion-resistant for food and chemical environmentsASTM A240
Insulation Material	PIR	PIR has better fire resistance than EPSGB/T 21558
Weight per Section	150–800 kg	Affects handling and structural support
IP Rating	IP54–IP65	Protects against dust and water jetsIEC 60529

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Housing Body
The housing itself: encloses and locates the internal parts and provides the mounting interface.
Inner Liner Part
Provides smooth interior surface and protects insulation from moisture

Material: Stainless steel
Insulation Core Part
Reduces heat transfer between tunnel interior and external environment

Material: Polyurethane foam
Outer Cladding Part
Protects insulation from physical damage and environmental factors

Material: Galvanized steel
Sealing Gaskets Part
Ensures airtight connections between housing sections

Material: Silicone rubber

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Controlled Cooling Tunnel

View system integration details

Manufacturers of Insulated Tunnel Housing

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Frequently Asked Questions

What is the purpose of the Insulated Tunnel Housing?

It serves as the outer shell of a Controlled Cooling Tunnel, providing thermal insulation to maintain low temperatures and minimize heat transfer from the environment, ensuring energy efficiency and precise temperature control.

What materials are used in the housing?

The housing is made of insulated steel panels with a polyurethane foam core and stainless steel cladding. The insulation material is PIR (polyisocyanurate), which offers better fire resistance than EPS.

What are the key parameters to consider?

Key parameters include internal width (600–2000 mm), internal height (400–1500 mm), section length (1000–6000 mm), insulation thickness (50–150 mm), thermal conductivity (0.020–0.040 W/(m·K)), max operating temperature (80–200 °C), surface temperature (≤40 °C), air leakage rate (≤1.5%), IP rating (IP54–IP65), and weight per section (150–800 kg). These are reference ranges and must be verified for the specific model.

How do I verify compliance with standards?

The housing references standards such as GB/T 4272, GB/T 10294, GB/T 14295, ASTM A240, GB/T 21558, and IEC 60529. These are procurement references; you must confirm with the legal manufacturer or supplier that the specific product meets the required standards for your application.

Data Basis

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Preliminary Technical Classification

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pressure:	0 to 2 bar (gauge)
flow rate:	Up to 5 m/s fluid velocity
temperature:	-40°C to +150°C
slurry concentration:	Up to 40% solids by weight

Insulated Tunnel Housing

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards