SEC - Sectional Overhead Doors

• Top mounted, high cycle torsion spring.
• Instant reverse full width bottom safety edge.
• Automatic latching device (manual doors only). Keep door from rebounding open upon closing.
• Permanently lubricated door roller bearings.
• Adjustable bulb type seals on perimeter.
• Panel sections fully gasketed.
• Panel sections heated at gasket areas to prevent freezing.
   

Panel:
Door panel sections are constructed with 18 Ga. #304 2B stainless steel perimeter channel, joined at corner sections with aluminum-magnesium cast corners, and clad with 26 Ga. G-90 galvanized steel, white painted with non-directional stucco embossed pattern. Finish paint to be Imperial white modified polyester with a dry film thickness of 1.0 mil inclusive of primer coat. All seams to be sealed. Meets USDA-MID and Agriculture Canada requirements.

Track:
3" 10 ga. galvanized "J" track and hardware factory mounted on casings. Door glides down and in on inclined track for positive seal and immediate clearance of gaskets when opening.

Power Drive:
TEFC fractional HP synchronous AC motor coupled to 20:1 worm gear in oil bath totally enclosed for life. Adjustable, precision machined torque limiter designed to slip on overload only. Smooth, quiet operation with "soft" start and stop. Operates at average speed of 20 inches per second. (2) remote pullcords for open/ close controls. Control voltage 24 vac. Entire system NEMA 4 standard. Full width, instant reverse safety edge-non-electric. Drive chain to be fully enclosed in galvanized steel drive track. Optional chain hoist available on manual doors or as back up on power driven doors.

Insulation:
Clark doors are filled with NON-CFC polyurethane insulation "R"-7.8 per inch that provides outstanding strength and rigidity to the door as well as excellent thermal and acoustical performance. The insulation is injected to fill the door without voids. Steel facings are chemically fused to the insulation to provide vapor tight construction.

Controls:

• Description:
  Clark's sectional overhead doors (SEC) are power or manually operated to suit your needs. Vertical tracks, torsion spring counter balance and door rollers are designed for smooth easy operation to fit applications with limited side room. Door seals tightly on frame with inclined door track. High lift design is available.
  
  Applications:
  Clark sectional overhead doors ideally fit those applications with limited side room, typically, refrigerated loading docks and narrow corridors. Door can be used interior or exterior.
  
  Construction:
  Face Mounted Frame: Vertical casings and header are Arctic white reinforced pultruded fiberglass. Casings and header are factory drilled and marked for rapid field assembly and perfect alignment.