Curtain
The door curtain is manufactured from SBR black; EPDM blue or grey rubber. It is 1/4 inch thick with a heavy-duty polyester reinforcement laminate. The curtain has a tensile strenght of 2000 psi. This ensures a rugged operation and flexibility in a temperature range of -40°C to 85°C.
Endlocks
The "Double Seal" endlocks (edge that holds the curtain in the vertical guides) have two sealing ridges that prevent air infiltration under positive or negative pressure. They are made from EPDM rubber with continuous Teflon strips vulcanized and chemically bondded to form an integrated unit. This makes for a curtain that is both durable, weathertight and has an exceptionally smooth operation.
Bottom Bar
The bottom bar is standard structural steel, finish painted in security yellow. (other colours on request) It is equipped with a center mounted pintel hinge with shear pins, which allows the bottom bar to fold away from the point of impact and break away from the vertical guides. This allows the curtain to safely leave the guides minimizing damage to the vehicle and the door. It also facilitates reinstallation of the curtain into the guides. Under certain extreme wind conditions, wind bars can also be installed.
Springs
Torsion springs (100,00 cycles) are mounted on the outside of the main C-channel cross member permitting easy access for maintenance. The springs are mounted on a 32 mm (1-1/4 in) cold rolled steel shaft which is attached to the cross member with Pollard bearings.
Operator
The electric operator (IGH) is a heavy-duty industrial motor with a mechanical brake. The operator is of sufficient power to operate the door at speeds of 305 mm to 610 mm (12 - 24 in) per second.
The operator is coupled to a heavy-duty industrial reducer with gears bathed in oil. It is designed for continual use and ease of maintenance.
The operator is equipped with a torque limiter.
The operator is equipped with a hand chain and electric disconnect for manual operation during electrical shut downs.
A limit switch is mounted directly on the operator.
Electric Panel
The electric panel is CSA approved and will meet all local and architectural norms as specified. It will have quality reverser / starters, a cycle counter and three push buttons on the panel front.
Finish
All metal surfaces will have one coat of primer and two coats of yellow finish paint. All pain will be environmentally approved water based product. Other colours are available on request.
Accessories
Vision panels, photo cells, remote controls, bottom safety edges, loop detectors and card entry systems are some of the many accessories.
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