SD electric door operator is suitable for any single sliding industrial or fire door up to 400 sq. ft in area. It has a quick disconnect arm, spring loaded and can be disengaged from floor in the event of power failure. Fusible link is provided when used with sliding fire door.
Three Button Control:
Momentary contact type for open, close, stop. Operator may be stopped in any position and door moved in either direction from that position. Close button can be wired for constant pressure when specified. Control circuit 24V AC for users protection.
Adjustable Automatic Friction Clutch:
Will protect door and operator in case of obstruction.
Limit Switches:
With oilite bronze cams and precision micro switches for automatic stopping of door in open and closed positions (easily adjustable without tools).
Reversing Contactor:
Heavy duty type.
Reduction System:
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.
Dual Trolley:
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.
Motor:
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.
Manual Overload Relay:
For overcurrent and under voltage protection; can be reset manually.
Electro-Mechanical Instant Reverse Or Stop:
This built-in door load sensing device is optional equipment (at extra cost). If closing door meets an obstruction, door will instantly reverse and automatically stop at fully open position or, when specified, can be wired to stop door only. This system eliminates the use of air hose, air switch, retractable cord, etc.
Solenoid Brake:
To prevent door from coasting and to hold it in any position.
Headroom Required:
8″ (20cm) minimum above door track.
Backroom:
47″ (137.5cm) plus door width.
Finish:
Primed with rust-proof primer and spray painted in blue hammertone enamel.
Three-button control post:
Open/Close/Stop with momentary pressure. The operator can be stopped at any time and restarted in either direction as needed. On request, the close button can be connected to require continuous pressure. The controls are powered at 24 volts for user safety.
Starter:
Robust type switch, consisting of two triple pole relays, each operated by a three-point hinge-type armature and mounted on a common frame. A mechanical interlock prevents any simultaneous operation. Each relay is equipped with auxiliary contacts (single or double pole depending on the needs) and its coil is powered at 24V AC. The load contacts are capable of cutting a non-inductive load of 15A @ 120V AC, 10A @ 240V AC, and 5A @ 600V AC. The connection terminals are of the “Quick Connect” type (0.25″ – 6.35mm). The useful life of the mechanical parts is 10 million operations.
Adjustable automatic friction transmission:
A non-combustible fibre disc is compressed by a strong spring and a self-locking adjustment nut between an aluminum disc with a diameter of 4″ (10cm) and a thickness of 1/8″ (0.31cm) which is pinned to the transmission shaft and a single groove 8″ aluminum pulley. This transmission can be adjusted according to the size and weight of the door and serves to protect both the operator and the door if it encounters an obstacle.
Control:
The components are enclosed in a punched box made of 14-gauge hot-rolled steel sheet. The box is equipped with a removable lid for easy maintenance service. Its dimensions are 8″ X 10″ X 4-1/2″ (20cm x 25cm x 11.25cm) and it is attached to the operator’s frame by four galvanized steel bolts. Internal connections are made at the factory.
Limit Switches:
A system composed of two “oilite” anti-friction bronze cams with notches which are retained and guided by a stop bar made of galvanized sheet steel, held under the tension of two springs. The cams move on a steel shaft (5/8″ D. x 10-3/4″ L. – 1.56cm D. x 26.88cm L.) threaded (NF) which turns in a pair of pre-lubricated ball bearings. The cams, when they reach pre-selected positions during their adjustment, operate one or the other of the switches to stop the operator in a fully open or closed position. The switches require a maximum push of 4 oz. (113.3g). The spacing between their contacts is 0.020″ (0.5mm) and their connection terminals are of the “Quick Connect” type of 0.25″ (6.35mm).
Gearing:
The first stage of this ultra-strong gearing system consists of two aluminum alloy pulleys (one of 2″ – 5cm and one of 8″ – 20cm) type B, carefully balanced and a “V” belt (width 5L); the second stage consists of five gear wheels No. 41B12 and a gear wheel No. 41B36 interconnected by a No. 41 roller chain and mounted on cold-rolled steel shafts with a diameter of 1″ (2.5cm) which turn in self-lubricating, self-aligning high-speed ball bearings. All the pulleys and all the gear wheels are keyed or studded to the shafts. The door travel speed is about one foot/sec (0.3m/s).
Drive Unit:
The very robust frame of this unit is made of hot-rolled steel angles (2″ x 2″ x 1/8″ – 5cm x 5cm x 0.31cm) and sheet steel gussets. It is all assembled by electric welding to obtain maximum rigidity.
Overhead Carrier:
Composed of two parallel hot-rolled steel angles (2″ x 2″ x 1/8″ – 5cm x 5cm x 3.1mm) mounted with hot-rolled steel rods (3/8″ – 9.5mm). The cast aluminum alloy trolley is driven in both directions by a No. 41 roller chain in a closed loop for smooth, frictionless operation. In addition, a rotating spacer on ball bearings supports the carrier in the middle and prevents the chain from rubbing.
Safety Lever:
In a cold-rolled steel sheet box of No. 11 gauge, a hot-rolled steel rod of 5/8″ D. (20.5mm) with a forked end held in the overhead carrier trolley by a spring mechanism which can be operated at ground level to release the door in case of power failure. When this operator is used with a fire door, a fusible link is added that allows the door to close by itself in case of fire.
Manual Thermal Protector:
Serves to protect the motor from current overloads or voltage drops. Resets manually.
Control Transformer:
The control circuit is powered by a step-down transformer with a power of 25 volt-amperes. The primary voltage varies depending on the situation and can be 120, 208, 230, 240. 416, 460 or 600 volts AC and the secondary voltage is always 24 volts AC.
Motors:
The motors used in these operators are of the “squirrel cage” type and designed for continuous use. They are available in the following powers: 1/3 HP (248.6W), 1/2 HP (373W), 3/4 HP (559.5W), 1 HP (746W) and can be powered at 120V or 240V AC single-phase (capacitor start) or at 208V, 230V, 416V, 460V, or 600V AC three-phase. Their loaded rotation speed is 1725 revolutions per minute, they run on lifetime-lubricated ball bearings and are mounted in a rigid 56C format frame. The shaft diameter is 5/8″ (1.56cm). Special windings for other voltages available on request. The use of the 1 HP motor on single-phase mains is not recommended.
Robust Electromechanical Brake:
This brake consists of a 4″ diameter aluminum alloy drum keyed on the motor shaft and a pair of friction band-lined shoes that are clamped on the entire perimeter of the drum (360o) by an adjustable spring mechanism. The drum stops the motor as soon as the power supply to the electric solenoid is cut off. This brake, which is mounted on a rigid steel plate and protected by a 14-gauge steel sheet box, is self-adjustable to compensate for normal wear of the bands.
All internal electrical connections are made in the factory according to a standardized color code. Wires for external connections are labeled to indicate their functions. A connection diagram is provided with each machine and each one is load tested in the factory before shipment.
Leader in door and gate operator
