Peristaltic Pump - Variations - 360 Degree Eccentric Design

360 Degree Eccentric Design

A unique approach to peristaltic hose pump design employs a single oversized roller on an eccentric shaft that compresses an engineered, low friction hose through 360 degrees of rotation. The benefits of this design include more flow per revolution and only one compression and expansion per cycle. At equal performance points this pump runs more slowly, with consequent longer hose lifetime, than pumps with multiple shoes or rollers.

Many older hose pumps use shoes to compress the hose. When the shoe slides over the outside of the hose, it creates friction and heat, which shortens hose life. A single roller pump uses a large diameter lubricated roller on an eccentric shaft that rolls over the hose. This means that it produces less friction, and therefore less heat, than a pump with shoes.

In addition to less heat, an eccentric shaft hose pump functions with only a single compression of the hose per revolution. For every one rotation, the pump has one compression of the hose, while pumps with multiple shoes or rollers have at least two compressions per revolution, and in some cases three or four. Since the hose is the heart of a peristaltic hose pump, and hose life is inversely proportional to the number of squeezes, this design will outperform a pump with shoes at the same speed.

The hose in this type of pump takes up the full 360 degrees of the pump housing. This is important, because at an equal size, this design will produce 55% more flow at the same speed.

Read more about this topic:  Peristaltic Pump, Variations

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