Aggregates Manager Digital Magazine
Issue link: http://read.dmtmag.com/i/85639
ROLLOUTS Minimizes structural vibration W.S. Tyler says its new F-Class four-bearing double-eccentric vibrat- ing screen minimizes structural vibration and delivers a more con- sistent stroke than traditional two-bearing screens. 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 op- posite direction, which creates an equal force to that generated by the body. As a result, the forces cancel each other out, so the dynamically balanced system does not transmit any vibrations into the structure. This allows screens to be placed side by side, if desired, minimizing investments in heavy structures. The double-eccentric shaft creates a constant positive stroke that is said to easily handle material volume spikes without losing momentum, which translates into pegging- and blinding-free aggregate operations as the consistent G-force keeps the openings clear. The screen is available in sizes from 6 by 12 feet up to 8 by 24 feet with inclines from 10 to 25 degrees. It screens material sizes from 6 inches down to 20 mesh, offers up to three screen decks, and comes with a base frame that allows for simple installation. Additional fea- tures include a rugged huck-bolted body design free from welds, 90-degree top and 45-degree bottom Durabend side plates, patented angle box tensioning, single-point grease lubrication, and hands-free tube housing for bearing work without come-alongs or drift pins. Write 53 on reader card. data wirelessly Cardinal Scale Mfg. Co. says its new SnapStream is the only NTEP legal-for-trade wireless truck scale system on the market for commercial applications. It allows a scale to send weight data wirelessly to an indicator, which, in turn, wirelessly sends it to a host of periph- eral equipment such as remote displays, printers, PCs, and networks. The digitally controlled weighing and diagnostic system is designed using 802.15.4 Zigbee protocol for reliable and accurate weight and data trans- mission. The system may be configured using one to 16 load cells. The truck scale junction box accommodates two to four, four-cell analog boards, which perform the analog-to-digital weight conversion for each load cell and transmit data wirelessly to indicators where the weight data is displayed. The indicators can send data wirelessly to any Cardinal remote displays, printers, or local remotes. The communications module may be used to interface wirelessly from the weight indicator to a PC using USB, RS232 serial, or Ethernet connectivity or a printer using RS232 serial or Ethernet. Write 54 on reader card. Sends weight Wear resistant, versatile Xylem's portable Flygt sludge 2600 pumps (models 2620.280, 2630.280, and 2640.280) have a range of 1.5 to 5.6 kW and are capable of flows up to 450 gallons per minute and heads up to 128 feet. The wear-resistant pumps handle solids up to 3.2 inches and sand concentrations of approximately 20 percent by weight, due to a larger inlet and pump volute, a Hard-Iron vortex impeller, a polyurethane-lined pump housing, and a side discharge design. The hydraulic ends of the pumps share drive units and common parts, and are interchangeable with similarly sized models of the 2600 drainage series, which allows end users to reduce spare parts inventory. The pumps feature the patented Flygt Plug-in seal, which provides a double mechanical seal in a compact and easy-to-replace single cartridge. External oil and inspection plugs allow for seal condition checks and oil changes without dismantling the pumps, and the removable top gives quick access to all electrical components. The pumps also incorporate the terminal board, which seals off the junction box from the motor, thus preventing any water from passing between compartments. The screwless, spring- loaded terminal design is said to ensure reliable connections and simplified wiring. Write 55 on reader card. AGGREGATES MANAGER March 2012 15