State-of-the-Art Peristaltic Hose Pumps
Eccentric Pumps is changing the way the peristaltic hose pump industry thinks about pumping and metering with our revolutionary hose pump technology. Since the heart of every peristaltic pump is the hose, we wanted to create a pump with a mechanical design whose sole purpose is to promote long hose life.
We accomplished this by eliminating the sliding friction of multiple shoes. Since friction builds heat, and heat is detrimental to hose life, the obvious solution was to change to a rolling element. Our large diameter roller provides a long sealing line so that the pump can build pressure without backflow. Additionally, a small reservoir of our synthetic DST™ lubricant further reinforces our peristaltic type hose pump technology by reducing friction between the roller and the hose while efficiently dissipating heat away from the process.
The next impediment to long hose life is the number of occlusions or hose pinches required to pump. A peristaltic type hose pump with four rollers or shoes will pinch the hose four times per revolution of the shaft. A pump with two shoes or rollers will pinch it twice per revolution. Because our pump uses a single roller mounted on an eccentric shaft, our hose is compressed only once per revolution.
Since peristaltic type hose pumps come in different shapes and sizes, the industry has introduced the P/100 ratio to make a fair and equal comparison of one pump to another. The P/100 ratio is the number of hose pinches required to displace 100 gallons of fluid. The Eccentric Pumps design has a P/100 ratio that is typically only 30% of a hose pump with two sliding shoes. Our pump has the lowest P/100 ratio in the industry for an equivalently sized pump!
Why should hose pump technology matter?
Most peristaltic hose pumps on the market today, including the Watson Marlow Bredel SP and SPX series hose pump and the Verder VF and Dura pumps, use shoes to compress the hose. When the shoe slides over the outside of the hose, it creates friction and heat. Heat is an enemy of long hose life.
The Eccentric Pumps SLP series uses a large diameter lubricated roller that does just that - it rolls over the hose. This unique approach to peristaltic hose pump technology means that there is less friction, and therefore less heat, than a comparable sliding shoe peristaltic type hose pump.
In addition, the Eccentric Pumps SLP series peristaltic hose pump has only a single compression of the hose per revolution. Compare this with our competitors' pumps that use multiple shoes or rollers. For every one rotation, our pump has one compression of the hose. Other competitors' hose pump technology features at least two compressions per revolution and, in some cases, three or four! Since the hose is the only wearing part in a peristaltic type hose pump, and hose life is directly proportional to the number of squeezes or pinches, our hose will outperform our competitors for most applications.
To accomplish this, our hose surrounds the full 360+ degrees of the pump housing. This is important because our pump, at an equal size (when compared to Watson Marlow Bredel or Verder), will produce 55% more flow at the same speed. This means that you can get more flow at the same speed or run our pump more slowly to produce the same flow.
So, when considering which peristaltic type hose pump to buy, think about these facts:
- A single roller is better than multiple rollers or shoes because it squeezes the hose only once per revolution
- A roller is better than shoes because it rolls across the surface of the hose and creates less friction and less heat than shoes
- A full 360+ degrees of hose compression is better than hoses arranged in a "C" shape because you get more flow per revolution
All three of these facts lead to longer hose life, less down time for maintenance, and a satisfied customer! For a full overview of the features and benefits of our hose pump technology, download our brochure. To see what they're saying about us in Pumps & Systems magazine, click the recent issues below. Or, browse data sheets, downloads, and press to learn more about our peristaltic hose pumps.
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