
High Performance Industrial Roll up Door Vortex Turbine Rapid Roller Shutter Revolving Spiral Door. High-Speed Operation: Adjustable speed from 1-2m/s for efficient industrial traffic flow. Advanced Safety System: Equipped with infrared induction and anti-smashing grating for protection. Durable Material: 40mm thick high-tensile aluminum alloy cover with integral molding. Energy Efficient Sealing: Multi-point sealing including guide rail, curtain, and bottom seals. Servo Control Technology: High-precision encoder and servo tech for smooth, quiet, and safe operation. Customizable Options: Customizable size, color, and function to meet specific business needs. Balanced Mechanism: Balance springs reduce motor load, ensuring lasting vertical balance. Certified Quality: Products certified by CMA, CNAS, and BV for industrial reliability.