Stainless steel cold storage door

Main features

Advantages of Stainless Steel Cold Storage Doors:

Stainless steel cold storage doors can be used for combined cold storage and constant temperature rooms with temperatures not lower than -40°C.

Even when the temperature difference between inside and outside is more than 50°C, and the outside air humidity is over 80%, stainless steel cold storage doors can still provide excellent insulation.

The door frame is made from high-quality materials with special treatment, covered with metal panels, and filled with a one-time overall polyurethane foam.

The junctions between the door leaf, floor, and door frame are specially shaped and use low-temperature-resistant, highly elastic rubber materials. Two flat sealing surfaces improve the sealing performance.

Electrical components of stainless steel cold storage doors are made from high-quality products with advanced and unique control design. Therefore, the product has the advantages of advanced structure, attractive design, good sealing, flexible control, and long service life.

Technical Features of Stainless Steel Cold Storage Doors:

These doors are developed based on new preservation technology requirements and by drawing on advanced foreign technologies, solving the issue that some controlled atmosphere doors do not meet the highest international air-tightness standards. Compared to foreign products, these cold storage doors have unique and advanced features in terms of air-tightness, opening/closing performance, and cost.

The door leaf's insulation uses overall polyurethane foaming, and the frame is made entirely of fiberglass, with an exterior of stainless steel or color steel panels.

The doors use multi-bearing straight-track systems, making them easier and smoother to open and close. The air-tight strips are custom high-quality seals that are compression-resistant, highly elastic, low-temperature resistant, and corrosion-resistant. Overall, these cold storage doors are scientifically designed and internationally advanced, making them the ideal choice for controlled atmosphere storage facilities.

Sliding Door	The most common type. The door slides along a track, taking up no space in front. With a recessed track design, it automatically seals tightly against the frame when closed, providing excellent insulation. Suitable for large cold storage areas with frequent forklift traffic.	Manual sliding / Electric sliding (can be equipped with remote control or magnetic sensor)
Hinge Door / Fully Embedded Door	Commonly known as a hinged or swing door. The partially embedded (half-embedded) version fits into the wall panel, closes tightly, and can open up to 180°. Suitable for small to medium cold storage accessed by people or small carts.	Manual swing
Traffic Door	Can be pushed open from either side and automatically returns after people or forklifts pass through. Usually comes with transparent windows and impact panels. Ideal for busy passageways between refrigerated areas.	Two-way free push opening
Vertical Lift Door	The door slides vertically upward, perfect for spaces where the sides of the doorway are narrow but there’s plenty of height above.	Electric lift

1. Safety Escape Device (Internal Push Handle): No matter how the cold storage door is locked from the outside, personnel inside can simply press the internal escape push rod to easily open the door and escape, preventing accidents caused by being trapped.

2. Electric Heating Anti-Freeze Device: In cold storage or quick-freezing warehouses with temperatures below -10°C, electric heating wires (low voltage for safe heating) must be installed on the door frame and at the bottom of the door to prevent the door and frame from freezing together and becoming impossible to open.

3. High-Elastic Sealing Strip: Usually made of EPDM (ethylene propylene diene monomer) or TPE eco-friendly modified rubber, it has strong low-temperature resistance and anti-aging properties to ensure zero cold air leakage.

4. Hardware Accessories: Accessories like rails, hinges, and door locks should be made of high-strength aluminum alloy or 304 stainless steel castings to withstand frequent pull-and-open wear and tear.

• Panel Material: Typically made of 304 or 316 food-grade stainless steel plate (thickness usually 0.8mm - 2.0mm), with a brushed or laminated surface finish, providing impact resistance and corrosion protection.

• Insulation Core Material: Internally filled with high-pressure polyurethane (PU) foam, which is fire-retardant. The foam density is usually between 40~48 kg/m³.

• Door Thickness: Select the appropriate thickness according to the cold storage temperature:

• Above 0℃ (Fresh-keeping storage/workshop): Usually choose a thickness of 50mm or 75mm.

• -18℃ to -25℃ (Freezing and refrigerated storage): Usually choose a thickness of 100mm or 120mm.

• -30℃ to -45℃ (Quick-freezing/deep-freezing storage): Usually choose a thickness of 150mm or 200mm.