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W.S. Tyler Launches 10-Ft.-Wide Double Eccentric Screen

Fri October 12, 2012 - National Edition
Construction Equipment Guide


W.S. Tyler introduced a 10-ft. (3 m) wide version of its F-Class Vibrating Screen during MINExpo 2012 in Las Vegas. The F-Class offers a double eccentric screening solution for challenging applications that require minimal vibration transmission during operation. This allows for the use of multiple machines within the same building or structure without the same reinforcing measures required to house traditional vibrating screens. Due to its consistent G-Force, the F-Class also is known for its ability to keep screen openings clean, thus avoiding the pegging of material and making the processing of sticky material possible, according to the manufacturer.

“It just made sense,” W.S. Tyler President Florian Festge said. “Our double eccentric technology has been so effective that customers expressed the need for larger screens as their operations grew. We answered with the largest double eccentric screen to date, the 10-foot-wide F-Class. Its size, paired with its versatility, make the F-Class a viable option for customers who were previously forced to invest in much more expensive technologies, such as exciter driven screens. For these clients, the F-Class offers reduced capital expenditures combined with enhanced screening performance. How do you beat that? ”

The 10-ft.-wide F-Class follows a tandem design. Two completely new modules measuring 10 by 12 ft. (3 by 3.6 m) and 10 by 16 ft. (3 by 4.8 m) were engineered. By forming any combination of these two modules, machine sizes of 10 by 24 ft. (3 by 7.3 m), 10 by 28 ft. (3 by 8.5 m) or 10 by 32 ft. (3 by 9.7 m) can now be configured according to the process requirements. The F-Class, in tandem design, also can be operated at variable speeds and with different angles of inclination between the modules, thereby creating a banana type effect. The result is a fully customized screening system adaptable to meet the needs of almost any application.

The F-Class is now available in widths ranging from 3 to 10 ft. (.9 to 3 m) and is ideal for screening situations that require consistent, load independent performance at constant G-Force in all operational modes. Featuring four-bearing technology, the F-Class minimizes structural vibration and delivers a consistent stroke, which two-bearing or even horizontal screens cannot provide. This means that, when equipped with the right media choice, the F-Class virtually eliminates blinding and pegging. With the ability to handle the toughest applications, the F-Class is designed and built for classifying of ores, copper, gold, minerals, stones, sand and gravel, according to the manufacturer.

The F-Class features an advanced eccentric shaft design, supported by four high-performance, double spherical roller bearings. The double eccentric shaft creates a constant positive stroke that handles material volume spikes without losing momentum. As the eccentric shaft turns, the screen body is forced to follow the shaft movement. While it travels upward, the counterbalance weights move in the opposite direction and create an equal force to that generated by the body. As a result, the forces cancel each other, allowing a dynamically balanced system that transmits minimal to no vibrations into the structure. This allows multiple screens to be placed side by side while minimizing the investments into heavy structures. Furthermore, the design keeps noise emissions low for a quieter system and reduced overall plant noise. These features are the reason why demanding producers of products such as iron ore and phosphates as well as limestone utilize the F-Class in buildings housing up to 45 units over up to 8 stories while minimizing the investments into the required structures.

The continual circular screening action provided by the eccentric design also produces a constant, optimized G-Force. Not only does this further maximize screening efficiency, it allows the F-Class to be an effective solution in both wet and dry applications.

Designed for high tonnage outputs, the F-Class can process up to 1,200 tons (1,088 t) per hour, as well as provide fast, accurate sizing. It precisely screens virtually any material from 6 in. (15 cm) down to 20 mesh.

To provide maximum versatility, the F-Class can be run with up to three screen decks. The unit features inclines from 10 to 25 degrees and comes with a base frame that allows for simple installation in a customer’s existing structure.

The F-Class features a rugged HUCK-bolted screen body, allowing for extra strength and rigidity. Side plates are constructed with high-strength carbon steel. The area surrounding the shaft assembly is strengthened with a reinforcing plate, which ties together the side plate, screen panel and shaft assembly.

Screening experts work to design the ideal screens for each application. All 6, 8 and 10-ft. (1.8, 2.4 and 3 m) wide units are built on platforms that combine a machine width and a drive type, consisting of an eccentric shaft assembly. Within the platform, the customer chooses basic parameters, such as screen length and the quantity of decks the application requires. To personalize the machine and optimally adapt to each operation, the customer then configures multiple variables such as deck set-up, suspension systems, reinforcing plates, wear lining and stroke and speed combinations.

Every F-Class vibrating machine is born from substantial engineering experience. All screens undergo extensive testing, inspections and vibration analysis prior to shipping. These inspections assure proper workmanship, correct balance and smooth operation. During commissioning onsite, the screen is again tested to make sure it achieves optimal performance within the customer’s specific operation and performance targets. The F-Class is backed by a standard 18-month warranty from date of shipment, 12 months from the installation date, or 6,000 operation hours — whichever comes first. This warranty can be increased with optional customer-specific warranty upgrade packages.

W.S. Tyler is a member of the wholly owned German-based Haver & Tyler Processing Technology Alliance, and a leading manufacturer, systems provider and specialist in the screening, washing and pelletizing industry. Focused on all aspects of the screening circle, from particle analysis and screen media, to vibrating screens and processing technology, as well as screening services, it’s the company’s mission to bring new approaches and technologies to the marketplace.

For more information, call 800/325-5993 or visit www.wstyler.ca.




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