Residential
Electric Door and Gate Operators

Commercial-Industrial
Trolley type-ceilling, Wall Mounts, B1-Parting, Sliding Doors Electric Operators

Waterproof
Trolley Type-Ceillling and Jack-Shaft-Wall Mount

Explosion-proof
Trolley Type-Ceillling and Jack-Shaft-Wall Mount

Sliding Gate
Electric Operators

Swing Gate
Electric Operators

Trafic control barriers
To control of vehicular traffic in private and public parking areas.

Rolling &Fire Doors
Rolling Service Doors & Fire Doors. Jack Shaft - Wall Mount

Accessories
Different accessories for your needs

Safety Devices
Reverse Systems and Sensor

Entry-Exit Devices
Loop Detectors, Card Reader and more

Operating Controls
 

Modifications
 

Special applications
 
 

GENERAL INFORMATION

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).

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 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.

Motor:
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).

Solenoid Brake:
Will stop the door and prevent it from coasting.

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 hammer-tone enamel.



SPECIFICATIONS


Three Button Control:
Momentary contact type for open, close, stop. Fully guarded weatherproof, 250V. A.C. maximum. Screw type terminals.

Motor Control:
Heavy duty reversing contactor, two sets of three pole contacts on a common frame, mechanically interlocked to prevent simultaneous closure. Clapper-type armature with three point suspension, auxiliary contacts, SPDT or DPDT (as required) on each armature. Holding coils 24V. A.C. Contact rating: resistive: 15 amps @ 120V. A.C., 10 amps @ 240V. A.C., 5 amps @ 600 V. A.C.; inductive: 2 H.P. (1493W) max. Terminals .25" (.63cm) quick connect. Mechanical life: over 10 million cycles.

Electrical Control Cabinet:
Factory pre-wired, made of sheet metal; construction of suitable rigidity designed to meet EEMAC and C.S.A. classifications type 12 and 4. Size: 8" x 16" x 5" (20cm x 41cm x 13cm) with removable cover for easy service and maintenance. Mounted to unit chassis with four zinc plated steel bolts.

Limit Switches:
Rotary type, friction free oilite bronze cams grooved and lock guided in a formed galvanised steel plate. Cams are fitted on 5/8" d. (1.59cm) x 10-3/4" I. (26.88cm) C.R. steel shaft with N.F, threads which rotates in lubricated high speed ball bearings. Cams, on their preset travel activate the micro switches to cut power of motor control in both open and close directions of door. Operating force on limit switches: 4 oz. (113.4g) maximum. Contact separation: .020" (0.05cm). Pre-travel: .25" (.63cm). Termination: .25" (.63cm) quick connect.

Reduction:
Worm gear reducer, single stage, running in an oil bath with 40:1 ratio. C flange design cast iron alloy housing. Hardened and ground steel worm bronze and alloy gear for greater wear life. High speed taper roller bearings, double lip spring loaded seals to keep lubricant in and dirt out. Alloy steel shafting, hardened and ground for greater strength. Input 1750 RPM, maximum 2 H.P. (1493W). Output torque: 1380 in. lbs (1197cm kg). Overhung load 1100 lbs (500kg). Output shaft: 1" (2.54cm) d, speed 44 RPM. Door speed 8" (20cm) per second approx.

Unit Chassis:
Heavy steel channel frame assembly mreinforced with steel gusset plates, bolted together for greater strength.

Trolley Assembly:
Made from 2" x 2" x 1/8" (5cm x 5cm x .31cm) H.R. steel angles mounted together with 3/8" (9.5mm) H.R. steel rods. Cast aluminium alloy, chain driven carriage, slides between these dual angle tracks with continuous No. 40 push and pull roller chain, for smooth and friction free operation. In addition, a roller spreader is provided to support trolley at centre and prevent chain from rubbing.

Quick Release Door Lifting Arm:
1" x 3/8" (2.5cm x .95cm) H.R. steel bar, bent 90o, adjustable to suit headroom with spring loaded hook attached to aluminium door bracket. This arm quickly disengages operator in the event of power failure.

Adjustable Torque Limiter (Optional at extra cost):
Consists of a steel hub with two 4" diam. clutch plates, a 50B23 sprocket, two 4" diam. non-flammable friction fibre discs, and a spring washer with pressure cup. Holding force is from 50 to 1500 lbs. (23 to 680kgs), can be adjusted in the field as required, depending on door weight. Torque limiter will protect door and operator in case of obstruction or if door gets jammed. Synchronized limit drive assembly will not go out of adjustment when torque limiter is activated.

Manual Overload Relay:
Protects operator from over-current and under voltage. Manual reset.

25 V.A. Step-Down Transformer:
120V., 240V. A.C. primary to 24V. A.C. secondary, Class II.
208V., 230V., 416V., 460V., 600V. A.C. primary to 24V. A.C. secondary, Class II.

Motor:
Rated for continuous duty (capacitor start on single phase models). 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, 1725 RPM, ball bearings permanently lubricated, frame rigid type 56C, shaft 5/8" (1.59cm) or 7/8" (2.22cm) diameter. 2 H.P. (1493W) not recommended for single phase motors.

Unit is factory pre-wired, colour coded and tagged.
Wiring diagrams are enclosed with each operator.
Operator is pre-run and tested before shipment.