Materials Handling


 Advanced hardware and software are enabling modern pumps to tackle highly corrosive materials, yet require minimum maintenance. Sean Ottewell reports.


 Hoch entwickelte Hardware und Software ermöglicht es modernen Pumpen, bei minimalem Wartungsaufwand hochätzende Materialien zu verarbeiten. Sean Ottewell berichtet.


 Le matériel et les logiciels avancés permettent aux pompes modernes de résoudre le problème lié aux matériaux hautement corrosifs tout en réduisant la maintenance à un minimum. Par Sean Ottewell.


Pumps rise to challenge of corrosive materials


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n what the company describes as a ‘no-valve metering revolution’ Watson-Marlow Pumps Group has launched its Qdos 30 pump range. Developed in response to extensive industrial customer feedback for improved chemical metering, the Qdos 30 eliminates ancillary equipment, enhances productivity, and reduces chemical waste through more accurate, linear, and repeatable metering than typical solenoid or stepper driven diaphragm metering pumps. It delivers a 5000:1 flow range from 0.1–


500ml /min and 7bar while integrating easily through IP66 manual, analogue, and Profibus control options. Featuring patented ReNu pumphead technology, Qdos 30 is fully sealed for safe, tool-free maintenance. This means that fluids that are caustic, abrasive,


viscous, shear-sensitive, gaseous, are slurries or contain suspended solids, can be safely and securely handled (Fig. 1). Advanced control features include fluid level monitoring, fluid recovery, line priming and intuitive flow calibration. The pumphead can be configured on the left


or right, making it ideal for installing in restricted environments or on skids, while its sealed design and fluid recovery eliminate wastage and ensures operator safety. Operation is intuitive via a menu- driven interface with a 3.5-in TFT colour display, providing high-visibility status indication. The keypad and display are positioned for easy access, along with input and output connections. Featuring all-new hardware and software,


applications for Qdos 30 include: disinfection and pH adjustment of drinking water and industrial process water; flocculation; industrial cooling water preparation; and reagent dosing in mineral processing to name but a few. Maintenance intervals are up to six months


at typical usage, reducing the impact of process downtime. In addition to the Qdos 30 Universal+ pump, four other variants are available. Meanwhile Bredel, which is part of the Watson-


Marlow Pumps Group, has launched three new hose pumps. Designed to suit all dosing, metering and transfer applications from 2.8 to 1200l/h across a broad range of applications, the new APEX pumps have no expensive wearing components such as seals, valves, membranes, stators, rotors or glands (Fig. 2). Subsequently, they are ideally suited for handling difficult fluids - abrasive, corrosive, viscous, shear-sensitive, crystallising - or even fluids presenting a combination of these properties. Offering what Bredel describes as the best


Fig. 1. The new Qdos handles fluids that are caustic, abrasive, viscous, shear-sensitive, gaseous, are slurries or contain suspended solids.


performance for low flow transfer applications, should process requirements change, easy upgrades are achievable without having to buy a new pump. This is because APEX models are three pumps in one, with a single pump body adjustable for three hose sizes (10, 15 and 20mm) when production volumes rise.


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performance available on the market for pressures up to eight bar, along with reliable and stable flow up 1200l/h (with 20mm diameter hose), makes APEX first choice for ongoing, precise dosing. This is boosted by a new generation of long-lasting hoses that also supports repeatable accuracy when dosing additives, while continuous pump speeds up to 100 rpm provide a wider capacity range in comparison with alternative hose pumps. Bredel says that users of the APEX pumps


benefit from extremely low maintenance requirements, giving extended uptime and process continuity. With cast aluminium housing providing superior heat dissipation, robust direct-coupled technology and precision machined hose elements, APEX provides decreased cost of ownership, reduced operating costs and low inventory stocking. Among the many benefits of the new pumps is ease of scalability. While APEX offers optimum


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