The GT Model industrial type heavy duty worm gear trolley operator is designed to be used for rapid high frequency operation or on large standard lift overhead doors where no sideroom is available.
Three Button Control:
Momentary contact type for up, down, stop. Operator may be stopped in any position and door moved up or down from that position. Down button can be wired for constant pressure when specified. Control circuit 24V AC for users protection.
Adjustable Automatic Friction Clutch:
Will protect door and operator in case of obstruction (optional at extra cost).
Limit Switches:
Rotary type with oilite bronze cams and precision micro switches for automatic stopping of door in up and down positions (easily adjustable without tools).
Reversing Contactor:
Heavy duty type.
Reduction:
Worm gear reducer, single stage, running in an oil bath, 40:1 ratio, C flange design, alloy cast iron housing; door speed 8″ (20cm) per second approx.
Dual Trolley:
cast aluminium alloy chain driven carriage, slides in dual heavy steel angle tracks, with full No. 40 push and pull roller chain, for smooth and quiet operation. In addition a roller spreader is provided to support trolley and prevent chain from rubbing.
Quick Release Door Arm:
Quickly disengages operator from door at floor level (without tools) for manual operation in the event of power failure.
Motor:
3/4 HP (559.5W), 1 HP (746W), 1-1/2 HP (1119W), 2 HP (1492W) 120V or 240V single phase, 208V, 230V, 416V, 460V or 600V three phase. 2 Hp (1492W) not recommended on single phase motors.
Manual Overload Relay:
For overcurrent and under voltage protection (can be reset manually).
Headroom Required:
2-1/2″ (6.25cm) minimum from door’s highest arc of travel.
Backroom:
5’0″ (152cm) plus door height.
Finish:
Primed with rust-proof primer and spray painted in blue hammertone enamel.
Leader in door and gate operator
