Magnetic Pumps

The device for deuterium exchange consisted of a circulation circuit with a 2000-ml reservoir containing 96% of the total volume of the system. D2 could be circulated over the sample in the infrared cell by using a magnetic pump. The pump speed was calculated to be high enough to eliminate... 

Fig. 4.1-9.Magnetic pump Fig. 4.1-10. Plunger metering pump (LEWA)...

The method has also been applied by us 52). A sample of 20 g. of catalyst 5421 is brought into the reactor (volume about 300 cm.3) and reduced and evacuated in the usual way. The vessel is then immersed in a low-temperature bath, and a hydrogen isotope is adsorbed on the surface. The vessel is evacuated to a few mm. Hg and another hydrogen isotope introduced to a pressure of 60 cm. Hg. This gas is circulated by means of a magnetic pump, as a consequence of which the catalyst may exchange... 

The initial pH of the homogenised sample was 7.7 which was adjusted to 1.7 by addition of hydrochloric acid (Supra Pur, Merck) directly in the tank. The sample was further homogenised by circulating the water for one hour every six hours throughout the storage period, using a metal free magnetic pump. To allow colloidal material to flocculate, the sample was stored for 9 months before further treatment. 

Circulation of the electrolyte through the parallel plate cell was provided by a magnetic pump (Iwaki MD 50 R) and the electrolyte flow rate was measured with a magneto hydrodynamic flow meter (Deltaflux). 

Boulos introduces in his model the magnetic pumping effect. Moreover he shows the influence of particle diameter and of the initial radial pbsition of the particles in the powder feed tube on the trajectories. The reactor is shown in Fig. 23 a. The modelling has been realized for alumina particles with 10, 30, 60, 100, 150, 200... 

The larger 30 pm particles are not drawn into the fire-ball by the magnetic pumping (Fig 26b). They simply move with the sheath gas where they solidify. The 100 pm particles injected into the center move along the reactor axis and are completely melted after passing through the hottest zone (Fig. 26c). If the injection axis is radially displaced (ri/Ro = 0.05) the particles bounce off the fire ball, bounce again on the wall and finally enter the hot zone where they are melted Fig. 26 d. 

Concerning the "principle design sheet", there are no particular remarks from the operating feedback integrated electro-magnetic pumps at Superphenix are reliable an external circuit makes maintenance operations easy. 

Electromagnetically actuated pumps Magnetic pumps Magnetohydrodynamic pumps... 

Magnetic pumps are pumps using electromagnetic or magnetic fields to actuate and control fluid motion in microchannels. The application of electromagnetic or magnetic forces is a flexible way of manipulating fluids in lab-on-a-chip devices. 

Magnetic Pumps, Fig. 1 (a) Cross section of assembled micropump and (b) schematic cutout of membrane actuator (Reprinted from [2] with permission from Dr. Liu)... 

Magnetic Pumps, Fig. 3 Test and measurement setup for two micropumps of different driving mechanisms (a) permanent magnet with a small DC motor (b) integrated coil (Reprinted from [5] with permission from Dr. Ziaie)... 

Haeberie S, Schmitt N, Zengerle R, Duaee J (2007) Centrifugo-magnetic pump for gas-to-liquid sampling. Sensor Actuat A 135 28-33... 

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