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Fire-Rated Service Doors 631

​​​​​​​​​​fire door on building​​​​

​​​​​​​​​​​​​​​​​​​​​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

fire door mounting chart

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.


Standard max width
14' (4267 mm)

Standard max height
12' (3658 mm)

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

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 4 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

2-year material and workmanship

Fire doors are in compliance with
National Fire Protection Association (NFPA-80)
Underwriters Laboratories (UL & ULC)
New York City (MEA)
State of California (CSFM)​

Door Options
​​Door 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


Standard Exterior Color

  • white color swatch White
  • gray color swatch Gray
  • tan color swatch Tan
  • brown color swatch 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® Weathered finish, a thicker, industrial textured powder 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.​

Powder Guard color options​​​