Pumps and makes savings! Magnet coupling pump with innovative drive

Citation

(2003), "Pumps and makes savings! Magnet coupling pump with innovative drive", Pigment & Resin Technology, Vol. 32 No. 3. https://doi.org/10.1108/prt.2003.12932cad.004

Pumps and makes savings! Magnet coupling pump with innovative drive

Pumps and makes savings! Magnet coupling pump with innovative drive

Keywords: Pumps, Magnetic, Coatings

Acids, alkalis, toxic, corrosive, aggressive or simply "valuable" substances, are pumped without losses by the GIP magnetic coupling pump. This pump, designed as a compact close coupled model by Friatec Rheinhütte, is suitable for temperatures up to 120°C. In the experience of the manufacturer, this covers some 90 per cent of all requirements. Along with the innovative, easily serviced and cost saving drive system, the compact Tefzel lining ensures a good price/performance ratio (Plates 1 and 2).

Plate 1 Clear design, few components, no medium loss pump principle and the high "chemical resistance" of the material form the basis for a good application and performance capability

The innovative design of the GIP magnetic coupling pump meets the safety and economic requirements of both user and plant constructer. The close-coupled design requires little space and makes installation easier. The connection dimensions of the pump can be to the DIN or ANSI standard by choice. All components in contact with the medium are proofed against vacuum and diffusion by being lined with Tefzel, a high-grade fluoropolymer from DuPont comparable to perfluoralkoxy (PFA). The user will find the design details of the Rheinhütte magnetic coupling pump satisfactory both technically and economically. Even at low pressure whilst circulating the medium, the pressure regulated bearings of the inner rotor will balance out the axial thrust.

Plate 2 With no loss of the medium it is also suitable for universal use even in critical cases: a magnetic coupling pump from the Rheinhütte GIP range, intended for moving acids, alkalis, toxic, corrosive, aggressive or valuable media

Wear rings made of silicon carbon (SiC) on both sides of the impeller provide a high level of security against the ingress of solids. The fully opened impeller eye improves the net positive suction head (NPSH) and increases the efficiency. A high resistance to pressure and temperature is guaranteed by the double spacer can made of carbon-fibre reinforced Tefzel with a Kevlar sheathing. Both the radial bearing elements and the compact units, comprising impeller and internal magnetic rotor, are easily replaceable, which saves costs.

The radial bearing elements and the axle shaft are made of SiC. Even at this stage the designers were already placing great value on low maintenance and ease of servicing. The assembly of the outer rotor without keys, the back pull out design and low number of components also contribute to this. Taken as a whole, the individual features bring high savings in the operating costs. When this is combined with the favourable purchase cost of the pumps, the life-cycle costs (LCC) across the whole spectrum of the application up to 120°C are thus extremely favourable and at the moment would be hard to beat. For extreme temperatures above 120°C the company can also offer its customers magnetic coupling pumps sheathed with PFA.