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Magnetic drive pump (ISO and ASME)

RMI: One of the most economical magnetic drive pumps on the market

Rising safety standards, the need to reduce running costs and general considerations on quality assurance are increasing the use of plastic-lined, magnetic drive centrifugal pumps. Their fields of application range from the conveyance of highly corrosive and pure media in the fine chemicals and pharmaceutical industries, environmental engineering and waste disposal down to metal recovery and metal processing.

For many of the new and expanded fields of application the requirements placed on corrosion resistance, also with a view to the admissible operating temperature of the pump, tend to be in the medium to lower range. As a consequence, Richter Chemie-Technik has developed a magnetic drive pump, the RMI resp. RMA, whose design is geared to these medium-duty applications. The Richter magnetic drive pump series therefore cover an even broader operating range.

RMI / RMA pumps are rated for an operating pressure of up to 16 bar and for a temperature range of -30°C to +150°C (-20°F to +300°F). Eight sizes are available with flow rates of 0.1 to 180 m³/h and delivery heads of up to 150 m (490 ft.) at a speed of 3,500 rpm. The RMI is also designed as a close-coupled pump (RMI-B). Both corrosive and pure media can be conveyed with the RMI series: in the chemical and petrochemical industries, in the pharmaceutical and food industries, in the pulp and metal processing sectors as well as in the waste disposal/recycling segments. RMI pumps comply with the ISO standards and as RMA as ASME standards B73.3 and Cl.150.

The elementary safety features of a plastic-lined magnetic drive process pump from Richter were naturally retained in the RMI: The one-piece pump housing made of ductile cast iron is thick-walled and seamlessly lined with the fluoroplastic PFA (lining thickness: 3.5 to 6 mm). Pipe forces are absorbed by the metallic shell. The pressure-bearing can is made of carbon-fibre-reinforced plastic (CFRP). On the wetted side a PFA lining protects against corrosion. This unit is free of metal and therefore eddy currents and thus no heat enters the medium being conveyed. This is an important factor as regards operational reliability in applications with low flow rates or almost boiling media. In principle, the freedom from eddy currents represents energy savings compared with pumps with metallic cans. The SAFEGLIDE® PLUS plain bearing reliably prevents damage from dry running – in practical tests up to 30 min. and longer. The pump readily conveys media with a solids content of up to 20%.

With an intentionally reduced range of optional extras and additional equipment, the Richter process pump, RMI, is aimed at light to medium-duty applications. Thanks to its service-friendly design, the good hydraulics and the overall good value for money, the RMI is one of the most economical magnetic drive pumps on the market.