Iwaki MDG Series Magnetic Drive Gear Pumps

The Iwaki MDG series is a family of small seal-less magnetic drive gear pumps. The wetted parts are made of SUS316, PTFE, PPS and PEEK. A magnetic drive means there is no leakage through a shaft seal and no seal to replace. The compact size and the combination of low flow and high pressure make the pumps suitable for building into devices and equipment, including medical and laboratory equipment. Mikron Proses (Üsküdar, Istanbul) supplies Iwaki MDG pumps in Turkey and provides application consulting on model selection.

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Model families

The series is built around three model families, with an additional DC24V drive version of the R2.

Family	Max. capacity (L/min)	Max. discharge pressure (MPa)	Motor output	Connections	Mass (kg)
R2 (AC and DC24V)	1.6 – 2.1	0.15 – 0.3	10 – 20 W	Rc1/8, NPT1/8 or G1/4	1.2 – 2.1
M2 / M4	2.0 – 2.4 (M2); 3.8 – 4.8 (M4)	0.55 – 0.6	45 – 50 W (M2); 100 – 180 W (M4)	NPT1/8 (M2); NPT1/4 (M4)	3.6 – 8.2
R15	12.5 – 17	0.3	150 – 180 W	Rc3/8	7.8

The maximum vacuum is 5.3 kPa (absolute) for the R2, M2, M4S6 and R15T/P types and 8.0 kPa (absolute) for the M4T6 and R15K/C types. The liquid temperature range runs from 0-45 °C to 0-95 °C depending on the model, and the viscosity limit from 10 mPa·s (R2 DC24V) to 200 mPa·s (M4T6B220H). The catalogue notes that pump performance changes with the type of liquid.

Materials and model codes

On the R2 the pump head is GFRPPS and the gears are PPS; on the M2, M4 and R15 the pump head is SUS316, with CFRPEEK gears on the M2/M4 and PTFE or PEEK gears on the R15. The gear case is SUS316 on the R2 and R15 and PPS on the M2/M4. O-rings are FKM.

The model code identifies the family, the temperature range, whether a relief valve is fitted, the connection type and the motor (for example AC220-240 V, AC115 V or DC24 V). On the R15, the type letter selects the gear and bearing material and the temperature range: T (PTFE gear, GFRPTFE bearing, 0-45 °C), P (PEEK gear, PPS bearing with carbon fiber and PTFE, 0-45 °C), K (PTFE gear, GFRPTFE bearing, 0-95 °C) and C (PEEK gear, PPS bearing with carbon fiber and PTFE, 0-95 °C). The catalogue also lists a type with a built-in relief valve to protect the pump.

Operating notes

For pure water and solvents, the catalogue asks users to contact the manufacturer, and the same applies when the liquid viscosity exceeds the limit of the pump. Mikron Proses can review your liquid, temperature and pressure together with you before you choose a model.

Where the MDG series is used

The catalogue lists medical equipment (dialyzers, laser-applied surgical knives and X-ray film processors), semiconductor and LCD manufacturing equipment (plasma etching units, pure-water or solvent washing machines, soldering machines and IC testing units), printing equipment, food processing equipment, and waste liquid recovery equipment such as freon recovery and regeneration systems, photographic chemical waste processing and organic solvent recovery. Other uses include pure-water producing machines, oil circulation and filtering units, hydroponic systems and laboratory facilities.

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