Industrial sectional door is composed of torsion spring balance system, sectional door panel system, track system, and electric control system. When industrial sectional overhead door is start with commercial overhead door opener, the top spring twists and connects the door panel with a steel rail to lift and open, and the pulley door panels on both sides are also upward in the track.It is also called insulated sectional door and suitable for industrial workshop, logistics storage, commercial buildings, fire protection and other fields, with the characteristics of heat preservation, air-tightness, weatherproof, leak proof, energy-saving design, high-efficiency opening and closing speed.

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