Overhead Door- Fireking 631 Series

Overhead Door- Fireking 631 Series

Fire-Rated Service Doors 631

FireKing® Model 631

Fire-rated service door model 631 is a smaller fire door with UL/ULC ratings. The FireKing® Model 631 rolling fire-rated service door offers superior protection wherever a small UL listed fire door is required.

​Additional safety and protection features are available, including: Fire Sentinel® time-delay release device, FireLite® vision lites, smoke detectors, horns and strobes.

Fire-Rated Door 631 Mounting Chart

Model631 Mountingchart

Slat selection and finishes

Fire door slats are available in curved or flat profile in either galvanized steel. Galvanized slats are finished with a rust-inhibitive, roll-coating process that incorporates baked-on prime paint, and a baked-on polyester top coat of gray, tan, white or brown.

Design Highlights

  • Standard max width

    • 14′ (4267 mm)

  • Standard max height

    • 12′ (3658 mm)

  • Curtain

    • Painted galvanized
    • Standard baked-on paint finish available in gray, tan, white or brown

  • Guides

    • Three structural steel angles
    • PowderGuard® Weathered finish with black powder coat.

  • Labels available for masonry or non-masonry applications

    • UL/ULC 1-1/2 hr
    • UL/ULC 3 hr
    • UL oversized door

  • Mechanical auto resettable hoist (non-motorized)

    • Enables easy drop test and reset of fire door in seconds​

  • Fusible link for added safety

    • Separates at 165°F (74°C) to automatically close the door in case of fire

  • Viscous governor technology

    • Controls rate of door descent during a fire while reducing noise and vibration for quieter door operation

  • Innovative planetary gear design

    • Ensures years of reliable service and drop-out performance

  • Fire doors are in compliance with

    • National Fire Protection Association (NFPA-80)
    • Underwriters Laboratories (UL & ULC)
    • New York City (MEA)
    • State of California (CSFM)​

  • Warranty

    • 2-year material and workmanship

Color Options

  • White
  • Gray
  • Tan
  • Brown

Actual door color may vary from the digital representation shown here. Actual color samples are available by request through your Overhead Door™ Distributor.

Powder Coat Color Options

​PowderGuard® Premium powder coat finish options are available in approximately 200 colors as well as custom matching to specification. PowderGuard® Textured finish, a thicker, more scratch resistant coat, is available in 11 colors providing enhanced scratch resistance as well as aiding in hiding the dirt and blemishes that often occur in commercial environments.​

Design Options

  • Operation: push-up, chain hoist, crank and electric motor (RHX® or RSX®)
  • Fire Sentinel® time-delay release device
  • FireLite® vision lites (F265 slat profile only)
  • UL-listed brush-type smoke seals
  • Smoke detectors
  • Horns and horns with strobes
  • Cylinder locking bottom bar with mortise cylinder
  • Wind load (FBC, TDI, Miami-Dade)
  • PowderGuard® Premium powder coat finish options are available in approximately 200 colors as well as custom matching to specification.
  • PowderGuard® Zinc and PowderGuard® Weathered finishes


Industrial Operations
Industrial Operations
General Warehousing
General Warehousing
Heavy Industrial
Heavy Industrial Operations
High Security Facilities
High Security Facilities


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