Iwaki MEK Series Magnetic Drive Turbine Pumps

The Iwaki MEK series is a family of magnetic drive turbine pumps with SS316 stainless steel wetted parts. The pumps are seal-less and are suitable for the transfer of organic solvents and other chemicals without leakage. The self-centering impeller design positions the impeller automatically, and the specially treated SiC-D bearing material adds tolerance to dry running. Mikron Proses (Üsküdar, Istanbul) supplies Iwaki MEK pumps in Turkey and provides application consulting on pump selection and liquid compatibility.

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Four models in one casing family

The series has four models, named after the pump bore: MEK201 (20 mm), MEK251 (25 mm), MEK322 (32 mm) and MEK402 (40 mm). The design pressure is 1.0 MPa·G on all models.

Model	Bore	Motor output	50 Hz: capacity × head	60 Hz: capacity × head
MEK201	20 mm (Rc3/4)	0.25 kW, 4P	9 L/min × 10 m	12 L/min × 12.5 m
MEK251	25 mm (Rc1)	0.37 kW, 4P (0.55 kW 4P optional)	12 L/min × 20 m	16 L/min × 24 m
MEK322	32 mm (Rc1-1/4)	1.5 or 2.2 kW, 2P	29 L/min × 31 m	30 L/min × 49 m
MEK402	40 mm (Rc1-1/2)	3.0 or 4.0 kW, 2P	30 L/min × 45 m	60 L/min × 40 m

In the model code (for example MEK201-6-TS-KD-025) the numbers and letters stand for the pump size, the pump material (“6” for 316SS), the check valve material (“TS” for PTFE plus 316SS), the bearing material (“KD” for SiC and SiC-D) and the motor output (“025” for 0.25 kW 4P).

Construction and SiC-D bearings

The impeller, casing, casing cover, rear casing and shaft are 316SS, and the pump has a block-building structure. The inner magnet coupling (P type) is 316SS and the outer magnet coupling (M type) is steel. The bearing set combines a standard SiC bushing with a SiC-D sleeve. According to the manufacturer, SiC-D has a coefficient of friction one quarter of that of standard SiC, so less heat is generated in upset or dry-running conditions such as start-up and batch service, and it prolongs service life.

Operating limits and options

The liquid temperature range is -20 to +120 °C. The maximum specific gravity is 1.3 as standard (1.9 on an application basis), and the maximum viscosity is 30 mPa·s as standard (120 mPa·s on an application basis). DIN or JIS flanges are optional. An optional DRN series dry-running protector, which senses motor current to detect dry running, air suction and overload, can be added; it has RS485 communication.

Where the MEK series is used

The catalogue lists chemical processes, laboratory use, test and pilot plants, degreasing, water purification and seawater desalination plants, food, beverage and pharmaceutical manufacture, and ultrasonic cleaning machines, medical equipment and industrial cleaning devices. 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, see the Iwaki magnetic-drive process pumps page. A related turbine pump with a stainless steel casing is the Iwaki MDK series.