KNOLL centrifugal pumpTwo common situations of idling:

1, the impeller will melt along the axis, resulting in the impeller stuck on the shaft

If the impeller is stuck, it will stop without rotating. To correct this problem, disassemble the pump and use a drill to clean the holes in the impeller.

2. The back shell may melt

A hole may form in the back shell, allowing liquid to escape. Alternatively, the boss of the rear housing that holds the pump shaft in place may be deformed, which would allow the shaft to move rather than remain stationary. This will cause damage to the impeller and may cause the shaft to break due to the impeller bouncing on it. If the pump is made of stainless steel, it is unlikely that there will be holes or convex deformation in the rear shell. What can happen is that the impeller bushing gets stuck on the shaft.

aperture

The aperture of the impeller may also be a factor. The greater the clearance between the impeller hole and the shaft, the longer you will have before you suffer damage. On the same model, polypropylene will suffer damage faster than Kynar, while stainless steel will take more time than plastic.

The liquid used in the pump

Another factor is the liquid that was previously in the pump. If the liquid is at room temperature or a cooler liquid, the pump will suffer damage longer after starting dry rotation than when the liquid is hotter.

Safety options for dry pumps

If you use a pump for tank transfer and want to empty the tank, this may mean letting the pump run dry for a few seconds. If the pump dry time is less than 45-60 seconds, the pump should not be damaged. Whenever you become aware that the pump may have to idle in order to empty the tank, the operator must take care to ensure that the pump idles in the absolute shortest possible time. Any dry rotating pumps are not covered by the warranty.

The above content introduces whether the KNOLL centrifugal pump can be idled and how long the centrifugal pump can be idled. In addition, Shenzhen Oudejie Technology specializes in selling new original German imported KNOLL centrifugal pumps, and promises to sell products are new original imported, while providing our customers with quotation, selection, product information and other services.