Automatic door seals, whether they’re sliding, swinging, or revolving, rely on effective seals to maintain energy efficiency, control air flow, and provide security. Here are some common types of seals used for automatic doors:

  1. Door Bottom Seals:
    • These seals are installed along the bottom edge of the door to prevent drafts, dust, insects, and moisture from entering the building.
    • They typically consist of a flexible material like EPDM rubber or silicone, which compresses against the floor when the door closes, creating a tight seal.
    • Automatic door bottoms are a type of door bottom seal that automatically lifts or drops a seal when the door is closed, providing enhanced sealing without manual adjustment.
  2. Weatherstripping:
    • Weatherstripping is installed around the perimeter of the door frame to seal gaps between the door and the frame.
    • Common materials for weatherstripping include EPDM rubber, silicone, vinyl, or felt.
    • Weatherstripping helps to prevent air leakage, reduce noise transmission, and enhance thermal insulation.
  3. Brush Seals:
    • Brush seals consist of flexible bristles (often made of nylon or polypropylene) attached to a metal or plastic holder.
    • They are typically installed along the sides and top of the door to create a barrier against drafts, dust, and insects while allowing smooth movement of the door.
    • Brush seals are effective for sealing irregular surfaces and can accommodate slight misalignment between the door and the frame.
  4. Threshold Seals:
    • Threshold seals are installed at the bottom of the door frame to provide a barrier against water infiltration, particularly in exterior automatic doors.
    • They are typically made of aluminum or stainless steel with a flexible insert (such as EPDM rubber) that compresses against the bottom of the door when closed.
  5. Gasket Seals:
    • Gasket seals are compression seals installed between the door panels or between the door and the frame to create an airtight seal when the door is closed.
    • They are often made of EPDM rubber or neoprene and are available in various shapes and profiles to accommodate different door configurations.
  6. Automatic Door Sweeps:
    • Similar to door bottom seals, automatic door sweeps are installed at the bottom of the door to seal the gap between the door and the floor.
    • They are equipped with a mechanism that lifts or drops the seal automatically when the door is opened or closed, providing effective sealing without manual adjustment.

These seals play a crucial role in ensuring the efficiency, safety, and comfort of automatic doors in various environments, including commercial buildings, hospitals, airports, and retail establishments.

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