The Atlantic Freight Elevator is a holeless design with a side mounted hydraulic cylinder(s). The Model SFE has a single cantilevered holeless hydraulic system, the Model DFE has a double rail dual holeless hydraulic system.
Unlike conventional hydraulic systems, this design does not seep oil, making it one of the most environmentally friendly systems available.
Atlantic Freight Elevators are governed by ASME A17.1 / CSA B44 (elevator codes). Freight Elevators are allowed a vertical travel distance limited only by the capacity of the hydraulics.
The power unit and controller are located in a machine space that is adjacent to the hoistway.
Structure: The car is a welded structural steel assembly with a nonskid checker plate surface. The wall panels are constructed of sheet metal on a structural tube frame and are minimum of 2 meters high. The car assembly is guided by high tensile “I” beam vertical guide rails by means of 16 four inch, high speed, sealed bearings attached to the top and bottom of the car. This design provides for the highest stability and least distortion available in the industry today, providing a safe and durable system for both front and side loading. The freight elevator has a fully enclosed car with manual or power car doors and gates. Safety maintenance pins are provided, when put in place, will safely support the car during maintenance or service. Atlantic’s in-house welding shop and field service team are CWB approved to CSA W47.1 and W59 (elevator codes).
The Hydraulic System: The pumping unit is comprised of a direct coupled motor and fully submerged pump, oil reservoir, suction and filler strainer, solenoid operated lowering valve, pressure gauge with isolating valve, pressure relief valve, manual shut-off valve, and a manual lowering bypass valve to allow lowing of the car in the event of a power failure. The hydraulic control valve provides for soft starts and stops (optional pressure compensated flow control valve).
Our leak proof system is above ground and does not endanger surrounding soil with contamination. The hydraulic cylinder(s) is a single action, single speed, piston seal or displacement type with seamless tube, micro-honed cylinder walls and hard chrome finish piston rods. The cylinder(s) come equipped with a safety velocity fuse at the pressure port to stop downward motion of the platform in the event of a hydraulic supply line failure.
Synchronized telescopic cylinder(s) are available for low overhead applications.
The Electrical Control System: The control panel is comprised of two main contactors inline with thermal overload motor protection, a transformer to reduce the primary voltage to 120 volts secondary for operator safety and a fused circuit of industrial relays.
The floor selection push button controls are of the momentary contact (SAPB) type that will raise or lower the car until the selected floor is reached. The controls and equipment may be protected against unauthorized use by key switches. The control station is provided with an emergency stop button when depressed, renders all stations inoperable.
An automatic two-way leveling device is provided to maintain floor level.
No controls except the emergency stop will override a control device in operation. Controls on the car have priority and render hall station controls inoperative once a floor button is selected, and for a timed period to allow personnel to exit the car. Other than the leveling device, all controls are switched off when any door is open. The doors are mechanically locked when the car is not at the landings.
The failure of any single, magnetically operated switch, contactor, or relay to release in the intended manner shall not prevent the car from stopping in response to terminal stopping devices.
A pit switch is provided that when activated removes power from the system for safety during service and maintenance.