Heavy duty vortex pumps
1st Quarter 2018
Shaft power components
Becker Mining’s PVS range of vortex pumps has been designed to pump sludge and slurries containing large abrasive solids and fibrous materials in service industries. It can handle solids to 72 mm and SGs to 1,5, and achieves up to 87 m heads at speeds of 2950 rpm. With a heavy duty construction, these units are available in 5 and 8 cm models, with a 0,7 m spindle length and single motor drive.
The most important feature of these vertical pumps is the recessed, non-clog impeller design that prevents binding and clogging problems. Since the impeller is clear of the pump casing, any solids and fibrous materials that enter the suction inlet will be expelled through the pump discharge without damaging the impeller. A locknut that fastens the impeller to the shaft prevents the impeller from turning off if the motor is started in the wrong rotation direction. Another advantage is that spares are completely interchangeable.
They have a sleeve stuffing box clearance that minimises blow-back of materials being pumped around the shaft sleeve without requiring sealing contact. A high strength pipe column maintains alignment between the bearing frame and its casing. There are no submerged bearings on the cantilevered shaft. Bearings have been selected for a minimum service life of 24 000 hours when operating at any point on the hydraulic coverage curve with 1,0 SG. Grease lubrication is standard.
For more information contact Theo Cambanis, Becker Mining, +27 (0)57 396 2704, [email protected], www.za-becker-mining.com
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