The GTW 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. It is ideally suited for locations where the atmosphere contains dust, oil, water or liquid vapours.
Three Button Control:
Waterproof momentary contact type for open, close, stop. Operator may be stopped in any position and door moved up or down from that position. Close button can be wired for constant pressure when specified. Control circuit 24V. A.C. for user’s protection, Class II.
Adjustable Torque Limiter:
Will protect door and operator in case of obstruction (optional at extra cost).
Rotary type with oilite bronze cams and precision micro switches for automatic stopping of door in up and down positions (easily adjustable without tools).
Heavy duty type.
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.
Cast aluminium alloy, chain driven carriage, slides in dual heavy steel angle tracks, with continuous 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.
3/4 H.P. (560W), 1 H.P. (746W), 1-1/2 H.P. (1119W) or 2 H.P. (1493W), 120V. or 240V. single phase, 208V., 230V., 416V., 460V. or 550V. three phase. 2 H.P. (1493W) not recommended for single phase motors.
Manual Overload Relay:
For over-current and under voltage protection (manual reset).
Will stop the door and prevent it from coasting.
2-1/2″ (6.25cm) minimum from door’s highest arc of travel.
5’0″ (152cm) plus door height.
Primed with rust-proof primer and spray painted in blue hammer-tone enamel.