Pump upgrade

Grindex has unveiled its upgraded drainage pump range and the company claims that the new design triples the durability of the units. The added service life comes from increased wear resistance in the impellor which has been achieved by preventing abrasive particles from reaching the vulnerable parts of the pump. The newly designed hydraulics section with its closed impeller dramatically reduces the performance drop caused by long-term wear, according to Grindex. Maintenance on the units has been improved w

August 3, 2012 Read time: 2 mins

Grindex's new drainage pump range is designed for use in construction and quarrying applications

RSS424 Grindex has unveiled its upgraded drainage pump range and the company claims that the new design triples the durability of the units. The added service life comes from increased wear resistance in the impellor which has been achieved by preventing abrasive particles from reaching the vulnerable parts of the pump. The newly designed hydraulics section with its closed impeller dramatically reduces the performance drop caused by long-term wear, according to Grindex.

Maintenance on the units has been improved with a screw adjustment for impellor realignment to take account of wear. "Before it might have taken an engineer 30 minutes to an hour to adjust the impellor but the revised design allows it to be done in five minutes," explained Grindex general manager Dan Schaffer. "The oil inspection has also been eased with access on the outside of the casing where as previously the casing would have to be removed to carry out checks."

The modular design of the base of the pump allows all the units to be converted on site from dewatering configurations to slurry pumping.

Like previous Grindex models the pumps have an air valve that prevents pump damage from running dry. "Normally the pump running dry would result in the motor over heating," said Schaffer. "The air valve allows the air to operate the impellor and cool the motor and then be pushed out of the pump and not enter the pump line."

The pumps also feature the SMART electronic motor guard to prevent damage from phase drop out when operating with three-phase power. Additionally, the pumps are fitted with rubber shock absorbers, which help to protect vulnerable parts of the pump from impact damage.

Specification

Manufacturer: Grindex
Models: Drainage pump range - Micro to Magnum
Maximum head: 10.4 to 102m Maximum flow: 4.2 to 345 litres/s Weight: 10 to 540kg Discharge: 50 to 254mm

Special features: Close impellor design for reduced wear; Air valve to between dry running damage; Easy maintenance

Dewatering Pumps

Equipment for pumping out the water

One of the largest costs in the aggregate and quarrying sector is energy, and it has been estimated that pumping systems make up between 10-20% of total energy use. This means that using already efficient pumps more effectively can save in energy costs, and companies are now producing units that offer sophisticated additions.