Dialysis pump with maintenance-free bearings

Profile

What was needed: Spherical plain bearings for use in a dialysis pump
Requirements: Long service life, temperature resistance, minimised maintenance, lubrication-free
Area of application: Medical technology, fluid technology

The Japanese company Iwaki is one of the world's leading manufacturers of chemical pumps and flow control devices. Its strength lies in the production of various models in small batch sizes, which makes it possible to fulfil the requirements of a wide range of industrial sectors. The products also include wobble piston pumps, which are used in many laboratory applications and especially in dialysis machines thanks to their high dosing accuracy for viscous media with low pulsation.

Problem

Iwaki had originally used metal spherical bearings in its dialysis pumps, which required constant relubrication. The developers were therefore looking for a durable, trouble-free alternative that would minimise maintenance costs.

Solution

With igubal ® spherical plain bearings, which do not require any lubrication, the perfect solution was found. To determine whether the use of the plastic bearings was worthwhile, Iwaki carried out a test in which the pump equipped with igubal® was moved for 10,000 hours in a temperature cycle from -10 to +60 degrees - with satisfactory results. Since then, the pumps have been in reliable and trouble-free operation for over 7 years.

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