Press Release Summary:
Explosion proof 30 hp motor provides safe operation when driving belt conveyors in applications that have potential for fire or explosion, such as mining, feed and grain, sugar mills, and fertilizer plants. Low-profile, 12.5 in. dia motor has heavy-duty bolts; secondary o-ring seal for complete hermetic sealing; standard face width of 51 in.; and cast iron shell, shaft, and end cap. Drum speed is 600 fpm to match most mining applications.
Original Press Release:
Heavy-Duty Explosion Proof Drum Motor Drives Provide Safe Operation In Mining Industry Belt Conveyors
Explosion proof internally powered drum motors, that provide safe operation for driving belt conveyors in the mining industry, are available from Van der Graaf Inc. The low-profile motors feature heavy-duty bolts, a cast iron end cap and a secondary o-ring seal for complete hermetic sealing. The motors allow high wall mining operators to reach coal seams as small as 3 feet in height. The motors may also be used in other applications that have potential for fire or explosion, such as: feed and grain, sugar mills and fertilizer plants, among others.
The 12-1/2-inch diameter drum motors feature cast iron external components (shell and shafts) that resist corrosion and contamination. The conveyor drive has a 30 horsepower motor and a standard face width of 51 inches. Drum speeds are fixed at 600 ft/min to match most mining applications. The motors meet stringent Mining Health and Safety Administration (MHSA) requirements.
Van der Graaf drum motors are self-contained, with fewer moving parts than exposed drives. Mounted with just two (2) brackets, there is no need for multiple parts -- and multiple vendors. Ordering and installation are quick and easy requiring less than half the time needed to install external drives.
The parabolic (machine-crowned) outer shell tracks on all points of contact to maximize belt traction, ensuring even belt wear and extending belt life. The drive is hermetically sealed in the shell to protect the motor from water, dirt, dust, grit, chemicals and other potential contaminants. The motor's compact design eliminates all external parts, such as: motors, gearboxes, chains or belts, pillow block bearings and associated guards. The low-profile design allows mining operators to maximize profitability of coal removal by minimizing the amount of overburden that is harvested.
Drum motors in the Van der Graaf family feature internal AGMA 12 rated gears, made of high alloy steel with precision cut and honed teeth -- reducing noise levels to meet OSHA requirements. Efficient and reliable, the inverter duty motors run at 96 percent efficiency, saving up to 30 percent on power consumption when compared to exposed drives and are available in all standard voltages.
Virtually maintenance-free, the units only require an oil change after 50,000 hours of operation and the oil change can be performed without removing the drum motor from the conveyor. The drum motors withstand the rigors of harsh environments including high pressure and chemical washdown.
For more information on explosion proof drum motors contact, Van der Graaf Inc., 2 Van der Graaf Court, Brampton, Ontario L6T 5R6 Canada, toll-free phone 888-326-1476, fax 888-326-0089, www.vandergraaf.com.