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The Niagara F-Class vibrating screen
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Canada-based screening, pelletising and crushing solution provider Haver & Boecker Niagara has updated its Niagara F-Class vibrating screen with new technology.
The company launched the new Niagara F-Class at MINExpo International, which took place in Las Vegas, US last week. The new design retains the technical benefits of the original F-Class vibrating screen, along with modifications designed to simplify maintenance and maximise performance and longevity. The F-Class is available with a variety of configurations and upgrades, and can be used in both stationary and portable applications.
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Duncan High, the product manager behind Haver & Boecker Niagara's new F-Class design, said: "Our new design results in a more durable and easy-to-maintain vibrating screen with the same industry-leading performance customers expect from the F-Class."
The F-Class vibrating screen is now primarily manufactured with vibration-resistant lockbolts rather than the traditional welding used in previous designs. The company noted that lockbolts are more effective at maintaining structural integrity during the demanding load-bearing, high-vibration operation of a vibrating screen, while also making maintenance more convenient, more safe and more cost effective.
Bar rails are now fastened to the cross beams with lockbolts, which makes them easy to exchange if they become worn. The company said that the robustness of the machine also permits cross beams to be positioned and lock-bolted every 4ft (1.2m) instead of every 2ft (0.6m), which allows for better clearance and easier maintenance.
The new F-Class design provides the option to upgrade the machine with Haver & Boecker Niagara's new Drop Guard system. The liners reduce wear and extend vibrating screen life, providing protection for the machine's cross beams. The blue liner drops over the cross beam with no adhesive or tools needed, which the company said makes installation quick and easy.
Haver & Boecker Niagara also redesigned the flat deck models of the new F-Class to create the largest amount of open area possible for modular screen media. It features replaceable polyurethane anchors, and the new high open area modular deck is suitable for almost any pin and sleeve modular screen media. The company said that the polyurethane anchors, which prevent premature wear on the deck frame, are easy to replace. Furthermore, the open design of the modular deck prevents material build-up on the bar rails.
In addition, the F-Class can be manufactured for side-tensioned or bottom deck end-tensioned screen media. Each new side-tensioned machine comes with Haver & Boecker Niagara's Ty-Rail quick-tensioning system with the ability to cut screen change-out times in half.
The new F-Class can be used in tough applications such as scalping, wet and dry screening and dedusting. The machine's double eccentric shaft assembly is supported by high-performance, double-spherical roller bearings that create a constant stroke to maintain g-force during material surging, which provides constant material stratification to ensure product specification.
The company said the double eccentric shaft assembly also creates a dynamically balanced system that transmits virtually no vibration into the structure — or chassis — which preserves the integrity of the structure while also allowing for multiple machine installations. In addition, it can reduce blinding and pegging while improving overall screening efficiency.
The updated vibrating screen is still equipped with shear rubber mounts instead of springs, as they minimise the lateral movement caused by traditional springs. This can reduce noise, maintain smoother operation and extend the life of a vibrating screen.
Haver & Boecker said that all Niagara vibrating screens undergo extensive testing, inspection and the Pulse Vibration Analysis before being shipped to ensure correct balance and smooth operation.
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