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FireKing® Fire Door Model 631 

fire door

The FireKing® Model 631 fire-rated service door offers superior protection wherever a listed fire door is required for average size door openings (max. width 14’; max. height 12’). The Model 631 rolling steel fire door is designed for both masonry and non-masonry mounted applications including: facilities with paint booths, file rooms, material storage locations, warehouses, shared walls between businesses, public record storage, and public buildings such as libraries. Customized fire doors are available for conveyor openings.

These doors feature a mechanical auto resettable hoist (non-motorized) that enables easy drop test and reset of the fire door in just seconds. Fusible links are mounted on both sides of the wall that separate to automatically close the door in case of fire. Additional safety and protection features are available, including: Fire Sentinel® time-delay release device, FireLite® vision lites, smoke detectors, horns and strobes.

Door Options

Exterior Colors


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

Additional Options

  • Operation: push-up, chain hoist, crank and electric motor (RHX® FK, RHX® or RSX®)
  • Fire Sentinel® time-delay release device
  • FireLite® vision lites
  • UL listed brush-type smoke seals
  • Flame baffle system (required for optional FM label)
  • Photoelectric or ionization-type smoke detectors
  • Horns and horns with strobes
  • Cylinder locking bottom bar with mortise cylinder
  • Wind load (FBC, TDI, Miami-Dade)
  • PowderGuard™ Finish offers a full spectrum of up to 215 colors as well as color-matching to specification


Max. standard width
14’ (4267 mm)

Max. standard height
12’ (3658 mm)

Galvanized steel, 24 gauge Slat profile available in curved or flat Standard finish available in gray, tan, white or brown

Roll-formed steel shapes attached to continuous steel wall angle for doors through 12' (3.65 m) wide Three structural steel angles with minimum thickness of 3/16 inch (5 mm) for doors over 12' (3.65 m) wide Guides for between jamb doors shall be structural angles PowderGuard™ Weathered finish with black powder coat

Labels available for masonry or non-masonry applications
UL 1-1/2 hr; UL/ULC 3 hr; UL oversized door

NFPA-80, New York City and state of California (CSFM) compliant

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

Controlled rate of descent for added safety
Governor controls rate of door descent during a 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

24 month limited warranty on door 3 year/20,000 cycle limited on door & RHX® operator system (when purchased together)

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