GHX Jackshaft Worm Gear electric door operator has been designed primarily to operate large industrial type doors such as rolling curtains, multiplex, multiblade, vertical lift or any upward acting door in hazardous locations where flammable vapours, combustible dusts, or ignitable fibres or flyings may be present in the air in quantities sufficient to produce an explosion.
Explosion Proof 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.
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).
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.
Explosion Proof Limit Switches:
Rotary type, friction free 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.
Explosion Proof Safety Interlock:
Electrical interlock switch automatically cuts off control circuit power in operator when chain hoist is in operation.
Left and right hand (must specify). Right hand shown.
Manual Overload Relay:
For overcurrent and under voltage protection (can be reset manually).
Explosion Proof Motors:
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. C.S.A. and U.L. approved.
20″ (50cm) minimum.
Primed with rust-proof primer and spray painted in blue hammertone enamel.