Key Advantages & Benefits:

• Extreme Heat Tolerance: The gearbox and structural components are engineered to resist warping or melting under extreme temperatures, ensuring the door remains firmly shut during a fire event.
• Positive Pressure Overcome: The heavy-duty closing spring is specifically calibrated to overcome the strong positive air pressure generated by emergency stairwell ventilation fans.
• Dual Functionality: Flawlessly transitions between an automatic handicap-accessible entrance and a mandatory, code-compliant self-closing fire barrier.
• Fire Alarm Interface: Instantly disengages the electronic hold-open feature when a fire alarm is triggered, allowing the mechanical spring to close the door immediately.

Versatile Applications:

• Hotel, dormitory, and residential high-rise staircase fire doors.
• Designated fire escape routes in corporate office buildings.
• Healthcare facility compartmentalization doors.

Frequently Asked Questions (FAQ):

• Q: Will the door still close if the motor's electronics burn out in a fire? A: Yes. The actual closing force is provided by a heavy-duty, heat-tempered mechanical spring, not the electric motor. If power is lost or electronics fail, the spring mechanically pulls the door shut.
• Q: Can this overcome the wind pressure in a pressurized fire stairwell? A: Absolutely. The closing force (spring tension) is fully adjustable on-site by technicians to ensure it reliably latches the door against strong positive HVAC pressurization.
• Q: Is it suitable for heavy steel fire doors? A: Yes, the high-torque design is specifically built to handle solid core wood and heavy-gauge steel fire doors weighing up to 250kg.