ETBX Industrial and Commercial type trolley electric door operator has been developed by Doorlec Corporation to be used in hazardous locations where flammable vapours, combustible dust, or ignitable fibres or flying may be present in the air in quantities sufficient to produce an explosion. To be used in conjunction with standard lift overhead doors where no sideroom is available.
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. C.S.A. an U.L. approved.
Adjustable Automatic Friction Clutch:
Will protect door and operator in case of obstruction.
Explosion Proof 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).
Heavy duty type.
The power unit of this operator utilises a large size V belt (5L) and heavy pulleys for primary reduction, roller chain and steel sprockets for secondary reduction to the output drive shaft (mounted on 1″ (2.5cm) C.R. steel shaft) rotating in high speed, self-lubricating, self-aligning pillow block bearings, for efficient long lasting operation. Door operating speed approx. 1.0ft (.3m) per second.
Cast aluminium alloy chain driven carriage, slides in dual heavy steel angle tracks, with full No.41 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.
Explosion Proof Motors:
1/3 HP (248.6W), 1/2 HP (373W), 3/4 HP (559.5W), 1 HP (746W), 120V or 240V single phase, 208V, 230V, 416V, 460V or 600V three phase. 1 Hp (746W) not recommended on single phase motors. For hazardous locations. C.S.A. and U.L. approved.
Manual Overload Relay:
For overcurrent and under voltage protection (can be reset manually).
To prevent door from coasting and for holding it in any position.
2-1/2″ (6.25cm) minimum from door’s highest arc of travel.
4’7″ (137.5cm) plus door height.
Primed with rust-proof primer and spray painted in blue hammertone enamel.