GH Worm Gear electric door operators, heavy duty industrial type, are designed and engineered primarily to operate rolling curtain doors, multiplex doors, multi-leaf doors, multi-blade doors, vertical lift doors, etc. Naturally many other types of doors can be equipped with this operator providing the door has a shaft as the basic driving element.
Worm gear reducer, single stage, running in an oil bath, 40:1 ratio, C flange design, alloy cast iron housing. No. 50 roller chain and sprockets from operator shaft to door shaft. Door speed: 7″ (18cm) per second approx.
Adjustable Automatic Friction Clutch:
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.
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.
Equipped with a disconnect device which allows a person to disengage the operator from the door and operate the chain hoist from the floor by hand in the event of power failure without having to remove the drive roller chain. Limit switches will not go out of adjustment when hoist is used.
Electrical interlock switch automatically cuts power of operator control when chain hoist is in operation.
Solenoid Disc Brake:
To prevent door from coasting and secure locking of door in closed position.
Left and right hand (must be specified). Right hand shown.
Manual Overload Relay:
For overcurrent and under voltage protection (can be reset manually).
3/4 HP (559.5W), 1 HP (746W), 1-1/2 HP (1119W) or 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.
20″ (50cm) minimum.
Primed with rust-proof primer and spray painted in blue hammertone enamel.