Series 621

This advanced service door is best suited to situations and applications with weather extremes. For example, agricultural facilities in the Midwest would benefit from the door’s rugged construction and weather sealed jambs.

Standard Features At a Glance

  • Max. standard width
    up to 20' (6096 mm) depending on gauge and slat type
  • Max. standard height
    up to 20' (6096 mm) depending on gauge and slat type
  • Mounting
    Interior or Exterior face of wall
  • Curtain
    • Interlocking roll-formed slats, end locks attached to prevent lateral movement; 22 gauge steel
    • Flat Profile type F-265 for doors up to 20' wide; 22 gauge galvanized steel
  • Bottom Bar
    Two PowderGuard® Premium powder coated angles (min. thickness 3/16") with 2-wire, self-monitoring, fail safe, electric sensing edge
  • Guides
    Three structural steel angles PowderGuard® Premium powder coated black
  • Operation
    Direct drive hypoid gear motor/brake assembly (20" per second up speed / 12" per second down speed); drive assembly and limit sensors are factory pre-assembled; manual crank for power outage
  • Control Panel
    Variable frequency drive controller with self diagnostics (time delay self close timer and non-resettable cycle counter included); two line LCD readout, enclosure NEMA 4X rated
  • Door Roll
    Direct driven, springless roll with integrated shafts; self aligning greasable sealed bearings; door does not require counterbalance device
  • Hood
    24 gauge galvanized steel primed, black painted; interior hood baffle included
  • Brackets
    Min. 1/4” hot rolled primed, black painted steel
  • Safety Devices
    • Built-in drop stop device – patent pending design provides additional peace-of-mind against uncontrolled curtain travel in a high vehicular traffic area
    • Continuously monitored sensing edge – all doors are equipped with a mandatory reversing or sensing edge to prevent entrapment. If the edge itself is damaged, it will need to be replaced in order for the door to operate without constant contact
    • Photoelectric safety sensors with guards – provide additional safety during door operation to help prevent injury and damage
  • Actuator
    Single open/close/stop push button station incorporated into Control Panel
  • Curtain Finish
    Gray, tan or white PowderGuard® Premium powder coat with hardening additive
  • Windload
    20 psf when wear strips are not specified


  • Flat Profile type F-265 for doors up to 20’ wide also available in: 20, 18 gauge galvanized steel; 22, 20 gauge stainless steel; .050” Aluminum.
  • Bottom Bar also available in: galvanized steel; stainless steel; aluminum
  • Guide options include: galvanized steel, powder coated steel and stainless steel
  • Hood also available in: powder coat; stainless steel; aluminum. Sloped Hood also available.
  • Brackets also available in: powder coat; galvanized steel; stainless steel
  • Direct Drive motors available in 1/2 HP, 1 HP, 2 HP and 208/230/460 VAC 3-ph
  • Dual photoelectric sensors available for safety
  • Optional push buttons, loop detectors, radio control, motion detectors, or any combination thereof available for door operation/control
  • PowderGuard® Premium powder coat finish with hardening additive available in up to 197 colors as well as color-matching to specification
  • PowderGuard® Weathered finish: Industrial textured powder coat provides a thicker, more scratch resistant coat for added product protection
  • Clear or bronze anodized aluminum
  • Uniformly spaced glazed acrylic vision lites available in 3"x 5/8" or 10"x 1"