In an industrial cold storage system, the entrance door is the largest point of heat loss. A poor-quality leaf not only pushes electricity costs up but also directly affects product storage quality. The T-Light hinged insulated door from Tan Long solves that problem at source: insulation, airtightness down to -45°C, and compliance with food industry hygiene standards. This page gives the full technical information, application range, detailed construction and the reasons Tan Long is a reliable partner for cold store owners, food processing plants and refrigeration contractors.
What is the T-Light hinged insulated door?
hinged insulated door (also known as the hinged cold room door, cold room door hinged type) is a dedicated door line made from insulation panel. Unlike the sliding door line, this door type operates by swinging around a hinge axis fixed to a solid perimeter frame. In terms of technical construction, the product comprises a door leaf with an insulation core of PU (Polyurethane) high density, combined with a frame system made of durable SUS 304 stainless steel or anodised aluminium. What sets this door line apart is the dedicated imported fittings, designed to withstand the harshness of deep-cold environments while still operating smoothly. hinged insulated door from T-Light operates stably and durably across a wide temperature range, from above-zero environments down to deep freezing rooms at -45°C. It is the solution for fixed installation positions in processing plants, where the opening frequency is moderate but airtightness is required to prevent heat loss throughout the shift.
Key technical characteristics of the hinged insulated door
hinged insulated door from T-Light has been researched and designed to resolve three core problems in refrigeration system operation: preventing heat loss, ensuring food safety and hygiene, and optimising energy consumption.
- On temperature control, this type of insulated panel door uses a PU (polyurethane) insulation core with a density of 40 kg/m³ and an extremely low thermal conductivity. The combination of quality panels and an airtight rubber gasket system rated for deep sub-zero temperatures keeps warm air infiltration to a minimum. In particular, the hinge and handle set is imported directly from the European brands Stuv, Intertecnica and MTH, ensuring consistent sealing even after tens of thousands of opening cycles.
- On food hygiene standards, all the materials making up the the hinged insulated door are non-toxic, do not support bacterial growth and withstand strong industrial cleaning chemicals. The SUS304 stainless steel door surface is completely impermeable, making periodic cleaning in processing plants easy and quick.
- On economics, the thick PU insulation layer significantly reduces the load on the refrigeration system. Khi the hinged insulated door is closed, the refrigeration compressor does not have to run continuously to make up heat, which directly cuts the electricity cost the business pays over a long operating life.
Detailed construction of the T-Light hinged insulated door
Door
The leaf of the hinged insulated door is produced by filling it with a high-density PU (polyurethane) insulation core at 40 kg/m³ using modern high-pressure injection technology. For standard thickness, customers have three common choices: 75 mm, 100 mm and 125 mm. Each thickness corresponds to the specific operating temperature range of each cold storage or freezer room. Both faces of the leaf are clad with SUS304 stainless steel in flexible thicknesses from 0.5 mm to 0.8 mm depending on the requirements of each project. The tight bond between the insulation panel core and the surface sheets creates overall rigidity, letting the door withstand heavy impacts in harsh industrial operating environments.
Door frame
The frame system of the hinged insulated door is carefully fabricated from SUS304 stainless steel or dedicated extruded aluminium sections. For aluminium, Tan Long applies an anodised surface treatment to improve resistance to oxidation and corrosion in constantly cold, damp environments. The perimeter frame is designed with a built-in channel for the heater wire. The position of this channel lets technicians replace or maintain the heater system easily without dismantling the whole door frame assembly, saving maximum time and periodic maintenance cost for the business.
Fittings and lock set
The handle and hinge system of the hinged insulated door from T-Light is selected from European brands such as Stuv, Intertecnica and MTH. The materials are engineering plastic or ultra-durable SUS304 stainless steel. In particular, the lock set always includes an anti-entrapment mechanism operable from inside, in strict compliance with the mandatory occupational safety standards for the enclosed space of a cold store. The door gasket system is made of rubber with extremely high elasticity, withstanding deep sub-zero temperatures to -45°C without deforming, maintaining stable airtightness throughout the product life. It comes with a dedicated heater wire whose power is calculated precisely for each temperature range to prevent frost forming in the frame gap, so opening and closing always stays easy.
T-Light hinged insulated door specification table
Below is a summary of the standard technical details of the hinged insulated door line supplied by Tan Long. These parameters help ensure durable operation and optimise electricity costs for the business.
| Technical specifications | Product information detail |
| Product line | hinged insulated door (swing door), dedicated type |
| Leaf core construction | PU (polyurethane) insulation core at a compressed density of 40 kg/m³ |
| Leaf thickness | Choice of 75 mm, 100 mm or 125 mm |
| Surface material | Rust-resistant SUS304 stainless steel |
| Surface sheet thickness | Flexible from 0.5 mm, 0.6 mm, 0.7 mm to 0.8 mm |
| Door frame system | SUS304 stainless steel or anodised aluminium alloy for refrigeration use |
| Working temperature range | Stable operation from above-zero temperatures down to -45°C |
| Airtight gasket | High-elasticity rubber that stays flexible in deep sub-zero environments |
| Heater system | Dedicated heater wire for cold storage, fitted neatly into the frame channel |
| Lock & hinge fittings | Imported from European brands: Stuv, Intertecnica, MTH |
| Safety mechanism | Lock with a built-in anti-entrapment release from inside |
| Practical applications | Installed in chill rooms, cold rooms, IQF systems, flake ice rooms and air blast freezers |
T-Light hinged door model selection table (TLH75 / TLH100 / TLH125)
The table below gives the parameters of each model in the T-Light SERIES, for reference when preparing estimates and when a door of the same type needs replacing later:
| T-LIGHT SERIES | |||
| TLH75 | TLH100 | TLH125 | |
| Application/Temperature Range | |||
| Cool storage (0°C to 8°C) | • | ||
| Cold storage (0°C to -28°C) | • | ||
| Freezer (0°C to -45°C) | • | ||
| Other purposes | • | • | • |
| Size (mm) | |||
| Max Width (Wmax) | 1390 | 1390 | 1390 |
| Max Height (Hmax) | 2850 | 2850 | 2850 |
| Min Width (Wmin) | 400 | 400 | 400 |
| Min Height (Hmin) | 400 | 400 | 400 |
| Door thickness (T) | 75 | 100 | 125 |
| Door | |||
| Stainless steel SUS 304 | Surface 2B, BA, HL, No.4, thickness 0.5mm to 0.8mm | ||
| Color coated steel | RAL color code: 9001, 9002, 9006, 9007, 9010, thickness 0.46mm | ||
| Door frame | |||
| Stainless steel SUS 304 | Surface 2B, BA, HL, No.4 | ||
| Special aluminum | Anodized surface, with thermal bridge cutout | ||
| Heating resistor | • | • | |
| gasket | • | • | • |
| Hinge | Made of SUS 304 stainless steel/plastic, imported from EU | ||
| Lock handle | Stainless steel SUS 304/plastic, can be opened from the inside, imported from EU | ||
Key advantages of the T-Light hinged insulated door
Product line the hinged insulated door from T-Light supplied by Tan Long has competitive advantages that meet the demanding requirements of industrial refrigeration.
- Insulation performance: The combination of a high-density PU (polyurethane) core and a multi-layer airtight gasket system lets the hinged insulated door form a consistent, solid thermal barrier. As a result, the temperature inside the cold storage stays ideally stable, even when the production area opens and closes the door continuously.
- Operating durability in industrial environments: Using rust-free SUS304 stainless steel, the product does not deform or corrode in the characteristically cold, damp environment. In particular, fittings imported directly from Europe let the hinged insulated door withstand tens of thousands of opening cycles without losing its original sealing, extending the life of the whole cold storage design.
- Safety for operators: A deep freezer room is an enclosed space, so a safety mechanism is mandatory rather than optional. An intelligent anti-entrapment mechanism is built directly into the handle, fully complying with occupational safety regulations in Vietnam as well as demanding international standards, so anyone inside can get out easily in an emergency.
- Maximize energy savings: Reducing heat loss means the refrigeration compressor system does not have to run continuously to make up heat. For businesses running a cold store on three shifts a day, installing the hinged insulated door from T-Light delivers a clear reduction in electricity costs and optimises profit over the long term.
- Flexibility for every project: With three thickness options (75mm, 100mm, 125mm) and two surface options (powder-coated steel or stainless steel), the product can be customised flexibly for each project package. From chill rooms held above zero to deep freezer rooms at -30°C or freezing chambers IQF conveyor reaching -40°C, the product performs to its full function.
Practical applications of the hinged cold room door
The T-Light hinged insulated door is installed in many different packages of an industrial refrigeration system. The four most common applications are:
- Chill rooms and cold storage rooms are the core application. The hinged door controls temperature at the entrance effectively, limiting cold loss while food, seafood and produce are moved in and out.
- IQF freezing equipment requires a technical access door able to withstand deep sub-zero temperatures and resist frost in the frame gap. The T-Light hinged door with an integrated frame heater meets this requirement.
- Flake ice rooms operate in high humidity and continuously low temperatures. T-Light SUS304 stainless steel and sub-zero rated rubber gaskets maintain sealing in those conditions.
- Air Blast Freezer need an insulated freezer door with a low heat transfer coefficient to hold a stable freezing temperature. A PU core at 40 kg/m³ in thicknesses up to 125 mm meets this insulation requirement.
Why choose the T-Light hinged insulated door from Tan Long
The four points below are all verifiable, not self-assessment:
| Criteria | Details |
|---|---|
| Materials stated openly | SUS304 stainless steel leaf and frame 0.5 – 0.8 mm or RAL colour-coated steel 0.46 mm · PU core at 40 kg/m³ · anodised aluminium frame with a thermal break channel. |
| Imported fittings | Hinges, suspension mechanisms and locks from Stuv, Intertecnica, Imamoglu and MTH (Europe) — with model codes for reference when replacement is needed. |
| Installed in the field | 29 projects since 2005 for seafood plants, food plants and distribution cold stores. See the project portfolio. |
| Same contractor as the cold store itself | Tan Long turnkey cold storage installation, so the door is chosen to match the panel thickness and the temperature range from the design stage, rather than being fitted as an afterthought. |
Scope of work: survey the door opening and temperature range → select the model and leaf thickness → supply and install → adjust the gasket, heater wire and lock mechanism → operator training → periodic maintenance under the contract.
Comparing the 4 types of cold storage door Tan Long supplies
A cold store usually uses more than one type of door: a door for people, a door for forklifts, and a door at the loading and unloading area. The table below compares them on actual parameters so you can choose the right type for each position:
| Door type | Suitable installation position | Maximum size | What to weigh up |
|---|---|---|---|
| T-Light hinged door (TLH) | Personnel access, small and medium rooms | W 1.390 × H 2.850 mm | Lowest investment cost, but needs clearance for the leaf to swing |
| T-Light manual sliding door (TLS) | Forklift access, large openings, high-volume rooms | W 3.000 × H 6.000 mm | Takes no space when open, needs a sliding rail along the wall |
| High-Speed Door | High-traffic passageways between two areas at different temperatures | W 4.000 × H 5.500 mm | Opens at 2.4 m/s and closes at 1.2 m/s, so cold loss drops sharply; it has a motor and a control panel, so it needs periodic maintenance |
| Loading Dock Door | Loading dock area, against the container trailer | To the dock opening size of the building | Seals the gap between the trailer and the warehouse wall, blocking heat and dust during loading and unloading |
Choosing leaf thickness by cold room temperature range
For both the hinged (TLH) and the manual sliding (TLS) lines, the leaf thickness is chosen by the operating temperature of the room, not by the door size:
| Warehouse type | Temperature range | Model | Leaf thickness |
|---|---|---|---|
| Cool storage | 0°C to 8°C | TLH75 / TLS75 | 75 mm |
| Deep-freeze store | 0°C to -28°C | TLH100 / TLS100 | 100 mm |
| Freezer | 0°C to -45°C | TLH125 / TLS125 | 125 mm |
From 100 mm upwards, the door is fitted with heater wire in the frame to keep the gasket and frame from freezing at sub-zero temperatures. Choosing too little thickness is the most common reason doors collect moisture, build up frost and lose gasket contact after only a few seasons of operation.
Comparison with other cold storage door types
The hinged door suits positions that are not opened too frequently. Other positions in the cold store need other door types:
- T-Light manual sliding door — it slides sideways so it needs no space for a swinging leaf, which suits narrow walkways or large openings.
- High-Speed Door — for positions with forklifts passing continuously, reducing cold loss on each opening.
- Loading dock door assembly — used at the area adjoining the truck, combined with a dock leveller and a sealing shelter.
Xem an overview of the four cold storage door types and how to choose by position.
Frequently asked questions about hinged cold room doors
How does a hinged cold room door differ from a sliding door?
The difference is the opening mechanism and the maximum size. The hinged door swings open, with a maximum size of 1,390 × 2,850 mm, and costs less but needs clearance in front of the leaf. The manual sliding door slides along the wall, reaches up to 3,000 × 6,000 mm, and is used for forklift routes and large openings.
Should the leaf be 75, 100 or 125 mm thick?
Choose by the operating temperature of the room: 75 mm (TLH75) for chill rooms at 0°C to 8°C, 100 mm (TLH100) for cold rooms at 0°C to -28°C, 125 mm (TLH125) for freezer rooms at 0°C to -45°C. From 100 mm upwards the door has frame heater wire to keep the gasket from freezing.
What are the maximum and minimum hinged door sizes?
Width from 400 mm to 1,390 mm, height from 400 mm to 2,850 mm. The door is built to the actual opening of the room within this range, not fixed to a few ready-made sizes.
What materials are used for food processing environments?
SUS304 stainless steel leaf and frame with a 2B, BA, HL or No.4 finish, 0.5 to 0.8 mm thick; or colour-coated steel in RAL 9001, 9002, 9006, 9007, 9010 at 0.46 mm. PU insulation core at 40 kg/m³. The frame can be anodised aluminium with a thermal break channel.
Why do cold room doors collect moisture and frost around the frame?
Three common causes: a leaf thickness too low for the temperature range of the room, a failed or missing frame heater wire, and a gasket that has hardened after long operation at sub-zero temperatures. These items should be checked during periodic maintenance every month.
Does the door have an anti-entrapment mechanism?
Yes. The door lock includes a mechanism that can be opened from inside even when the door is locked from outside — a mandatory safety requirement for deep freezer rooms.
Request consulting and a cold storage door quotation
Send us the door size (width × height), the operating temperature range of the room and the installation position so Tan Long can select the right model and leaf thickness. Call 0933 357 058 (Mr. Thinh) or send a quotation request.
The hinged cold room door consulting and supply process at Tan Long
Tan Long controls both design and manufacture at its plant in Duc Hoa 1 Industrial Park, Tay Ninh (formerly Long An), so the investor deals with a single point of contact from survey to handover:
- Survey and requirement definition: engineers work directly at the plant to establish capacity, layout, refrigerant and real operating conditions.
- Technical proposal: calculating a suitable configuration and discussing it with the investor's technical team before it is fixed.
- Detailed design: drawings are prepared and materials and equipment selected to match the refrigerant and the operating temperature range.
- Manufacture and works testing: machining, assembly and a test run before the unit leaves the factory.
- Installation and acceptance: connection into the plant's system, load testing and handover with the technical documentation.
- Warranty and operating support: operating instructions for the plant's technical team and fault support during the warranty period.
Related technical reading
- Cold storage for vegetables and fruits: Structure and function
- Construction of cheap, reputable, quality yogurt cold storage
- Construction and installation of reputable and quality potato cold storage
- How to adjust the cold storage throttle valve accurately and effectively
- Latest quotation for consulting, construction and installation of cold storage for fish preservation
