Iwaki MDE Series Magnetic Drive Process Pumps

The Iwaki MDE series is a family of non-metallic magnetic drive pumps for chemical processing. The wetted parts are made of fluororesins (ETFE and PFA) and fine ceramics, and the major fluoroplastic parts are reinforced with special metal inserts for mechanical strength. The catalogue gives a maximum delivery of 4.0 m³/min and a maximum casing pressure of 1.6 MPa. Mikron Proses (Üsküdar, Istanbul) supplies Iwaki MDE pumps in Turkey and provides application consulting on pump selection and materials.

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Model sizes and performance

The catalogue defines three main casing sizes. Values are for 50 Hz, clear water at normal temperature.

Model	Nominal bore (inlet × outlet)	Capacity (L/min)	Head (m)	Motor poles
MDE50-200	80A × 50A	833	53.0	2-pole
MDE65-160	100A × 65A	1,670	38.0	2-pole
MDE125-250	150A × 125A	2,400	22.5	4-pole only

Motor outputs for the large casings range from 11 kW to 37 kW, with 2-pole and 4-pole motors. The pumps have a back pullout construction: internal parts can be inspected or replaced without disconnecting the associated piping, and the unit-based construction simplifies maintenance and inspection.

Materials, standards and strength

The front casing is ETFE, the rear casing and split plate are PFA, and the impeller is CFRETFE. Bearing and sleeve are SiC, the gasket is PTFE, and the O-ring is Kalrez® as standard (FKM or EPDM on request). The exterior is covered with ductile cast iron (FCD400); the rear casing has a shape that prevents stress concentration and a dual structure reinforced with an FRP cover, and the spindle and magnet capsule are made of fluororesin with special metal inserts. The maximum casing pressure is 1.6 MPa and the liquid temperature range is 0-100 °C. Basic performance and dimensions comply with ISO 2858, 3661 and 5199 (MDE125-250 excluded), so the pumps are interchangeable with general-purpose centrifugal pumps.

The smaller MDE-ISO sizes (MDE32, MDE40 and MDE50) are covered by a separate instruction manual. Their wetted parts are selected as PFA (P), ETFE (E) or PVDF (V) through a single letter in the model code, and the motor outputs range from 4.0 kW to 15 kW.

Where the MDE series is used

According to the manufacturer’s catalogue, applications include the soda industry, gas absorption tower circulation, high-purity chemical manufacturing, water treatment chemicals, plating liquid filtration, pickling and alumite treatment, washing of ion-exchange resins, pure water production and the dosing of wastewater treatment chemicals. Chemical compatibility depends on the liquid, concentration and temperature, so please check your duty with us before ordering.

For the other Iwaki process pump series and a comparison, see the Iwaki magnetic-drive process pumps page.