- Tel: +86-13813573734
- wuwenna8@gmail.com
- No. 118, Changsheng Road, Qingsitang Village,Henglin Town, Wujin District,Changzhou City, Jiangsu Province,
Cold Storage Impact Doors (also known as double-acting traffic doors) are engineered for high-traffic zones in cold chain logistics and food processing. Designed with elastic self-closing mechanisms, they feature either low-temperature PVC curtains or high-density ABS/stainless steel panels with a PU core. Thanks to their heavy-duty spring hinges or gravity return systems, these doors effortlessly withstand frequent impacts from forklifts and carts, swinging open and automatically closing behind them without the need for manual operation.
1. Panel Construction
Outer Skin: ABS Engineering Plastic / FRP / 304 Stainless Steel (impact-resistant exterior, easy-to-clean interior).
Core Material: High-pressure injected rigid Polyurethane (PU) foam.
Foam Density: ≥ 40–45 kg/m³.
Panel Thickness: 40 / 60 / 75 / 100 mm (customized based on temperature requirements).
2. Temperature Ratings
Chiller Application: 0℃ to +5℃
Freezer Application: -18℃ to -25℃
Deep Freeze Application: Down to -40℃ (equipped with low-temp PVC seals and silicone sweeps).
Seal Rating: PVC seals and bottom sweeps available in -20℃ or -40℃ grades.
3. Thermal Performance
PU Thermal Conductivity: ≤ 0.022 W/(m·K).
Overall U-Value: Typically ≤ 1.0 W/(m²·K) (varies by thickness; significantly outperforms soft-strip doors).
4. Operation & Return Mechanism
Action Type: Double-acting (swings freely in both directions).
Return System: Heavy-duty double torsion springs or gravity return mechanism for automatic closing after impact.
Opening Force: Adjustable, typically 3–8 N·m (depending on door size).
Impact Protection: Optional stainless steel or reinforced ABS crossbars for added durability.
5. Sealing & Visibility
Perimeter Seal: Low-temperature EPDM or TPE gaskets.
Bottom Seal: Flexible low-temp sweep gasket to ensure a tight seal over uneven floors.
Vision Panel (Optional): Heated, anti-fog tempered glass window (Φ300mm circular or rectangular).
6. Hinges & Hardware
Hinge Type: 3D adjustable heavy-duty spring hinges or pivot systems.
Material: Galvanized steel or stainless steel for superior corrosion resistance.
Durability: Tested for ≥ 1,000,000 cycles (standard industrial grade).
7. Standard Dimensions
Single Leaf: Width 800–1200 mm × Height 2000–2400 mm.
Double Leaf: Width 1200–2000 mm (custom sizes available upon request).
Hard Impact Doors vs. Soft Strip Doors: Key Differences
Insulation, Sealing & Soundproofing: Hard impact doors offer vastly superior performance.
Visibility & Minimal Opening Resistance: Soft strip doors have the advantage.
Recommendation: For freezers, food processing plants, and temperature-controlled zones, hard impact doors are the optimal choice.