Quarry Southern Africa November 2018 - Page 41

MARKETS Heavy hitting SANY excavator is a GEM economy and is an integral part of SANY’s strategy to source only the best and most cost-effective components for its equipment. For example, Kawasaki pumps are also used to ensure constant hydraulic flow. In addition, the SY750 features a self-diagnostic system that flags any technical issues quickly, therefore reducing downtime. The standard warranty allows for care-free digging for the first year- and-a-half, or 3 000 hours, whichever is achieved first. The SY750 has a maximum digging depth of 7 620mm and a maximum excavating distance of 12 050mm. The maximum digging height is 11 200mm, while the maximum dumping height is 7 250mm. It has a 7m boom and a 3m arm, which translates into a bucket digging force of 402kN and an arm digging force of 345kN. While the SANY brand is fairly new in the mining industry in South Africa, especially in surface mining, Steenkamp expects the addition of the SY750 to allow GEM to offer complete solutions for its mining customers, no matter the size of the operation. Commenting on the prevailing business environment for mining equipment, Steenkamp points out that more work is becoming available, which means that product demand is expected to increase.  The SY750 is a primary loading tool for the opencast mining industry, from quarries to alluvial diamond mining. www.quarryonline.co.za  Pump manufacturer KSB Group has developed a special impeller to further improve the suction characteristics of its Movitec multistage high-pressure pumps. Believed to be the largest excavator in Africa has been launched by Goscor Earth Moving (GEM) – the official distributor of SANY. The SY750 is a primary loading tool for the opencast mining industry, from quarries to alluvial diamond mining. The 750t excavator is ideal to load blasted material onto articulated dump trucks (ADTs), as well as for stripping top soil and free digging. Andre Steenkamp, general manager of the SANY range under GEM, explains that with a 4.2m3 bucket a 40t ADT can be loaded in less than seven passes. “This is a highly affordable, large excavator.” The second unit to be imported from China by GEM has already been pre-sold prior to delivery. In addition, a major Zambian copper mine has ordered four units on a trial basis, with an additional six units ordered. “The SY750 will definitely carve a niche for itself in the market, due to its reliable power source and impeccable back-up from GEM,” Steenkamp notes. The Isuzu 6WG1X engine delivers a maximum torque of 2 138Nm at 1 500rpm. “The excavator has sufficient horsepower to get the job done quietly and efficiently and, perhaps most importantly, without breaking the bank.” The Isuzu engine brand is known particularly for its durability and fuel Pumping up the pressure The new impeller is useful in applications with critical inlet conditions. The new impeller is useful in applications with critical inlet conditions such as boiler feed applications, as well as applications in which the pump is required to take in water from low-lying tanks or at higher temperatures. These conditions are not always suitable for standard pumps, as pressure drop in the intake area can cause cavitation in the first pump stage, resulting in excessive wear of pump parts or motor bearings as well as a reduced service life of the pump due to damaged parts and an unbalanced hydraulic system. The new impeller is offered as an alternative to the standard product. When developing the new impeller, KSB’s design engineers ensured it can be used with a number of Movitec variants without necessitating modifications to the outer pump casing. The new impeller features a modified inlet diameter, vanes that allow a slightly diagonal throughflow and a newly designed stage casing, all of which serve to substantially improve the pump’s NPSH curve. The multistage centrifugal pumps from KSB’s Movitec range are designed for handling fluids such as water, coolants, condensate and mineral oils. They are ideal for a wide variety of applications ranging from industrial boiler feed installations in steam circuits, recirculation and fire- fighting systems, cooling water circuits and washing plants to pressure boosting in general process applications.  QUARRY SA | NOVEMBER/DECEMBER 2018_41