Fire-Rated Insulated Rolling Service Door - 635 Model 635

Fire-Rated Insulated Rolling Service Door - 635 Model 635

The FireKing® Insulated Fire-Rated Doors Model 635

Our insulated fire-rated ro​​lling service door offers superior protection wherever a listed insulated fire door is required (max. width 24’; max. height 24’). The Model 635 insulated rolling steel door serves as a thermal barrier, ideal for applications which require separation due to climate control requirements. The insulation used in this door offers added energy efficiency (R-value of 4.5), sound transmission control (STC 21), and the mi​neral wool utilized in the slat insert meets the Smoke and Flame Index of 5.

Common masonry and non-masonry mounted applications include: facilities with paint booths, file rooms, material storage locations, warehouses, shared walls between businesses, public record storage, and public buildings such as libraries. The Model 635 insulated fire door is available with UL (FM optional) labels for 1-1/2, 3, 4 and oversized doors.

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.


Product Specifications
Standard Max Width 24’0" (7315 mm)
Standard Max Height 24’0" (7315 mm)
Energy efficient Insulation R-value of 4.5
Sound Transmission Class 21 Ideal for applications that require sound control
Curtain Galvanized or stainless steel, in a variety of gauges; Flat slat profile; Standard finish available in gray, tan, white or brown
Guides Three structural steel or stainless steel angles. Guides also include locking bar or wind bar PowderGuard® Weathered finish with black powder coat
Labels available for masonry or non-masonry applications UL/ULC 1-1/2 hr (FM is optional), UL/ULC 3 hr (FM is optional), UL 4 hr, UL oversized door (FM is optional)
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)
New York City (MEA)
State of California (CSFM)


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

Standard Exterior Color

  • white color swatch


  • gray color swatch


  • tan color swatch


  • brown color swatch


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 options are available in approximately 200 colors as well as custom matching to specification.

Powder Guard Coat Colors

Door Options

  • Operation: 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)
  • 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​​
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