Important Elements in Pump Selection for Medical Equipments

Last month, we spent a whole month working with one of our clients to solve the problems they encountered in their projects. Here is their new machine:


As you see, this device is designed to care for the elderly. It helped the disabled old people to solve their toilet problem. In China, such kind of devices is very meaningful, both for disabled old people and their children. Because most of China’s young generation are too busy to support their family. They have little time to care for their parents.

In this device, pump selection is very important. The main job of the pump is to flush the fecal discharges clean. Therefore, the pressure is the key element for pump selection. If the pressure is not enough the excrement will be not rinsed clean. Most manufacturers choose the diaphragm pump due it can provide particularly high pressure. For this machine, it requires a minimum pressure of 0.25 MPa.

Our this customer has been developing and manufacturing this product since 2012 and have achieved a very good market share in China. However, in the past two years, they have encountered a very difficult issue. More and more competitors entered the industry, and the customer requirements are getting higher and higher. Noise has become a very important element affecting product sales.

As we all know, diaphragm pump noise is particularly large. This will seriously affect other people’s sleep. And most these products are used in public places like nursing homes. So the less noise your product will have, the better it will sell. We spent the whole month working with them together to solve the noise problem.

Of course, we recommended that they use our brushless DC centrifugal pump instead of the original diaphragm pump. The brushless DC centrifugal pump is super quiet, but the problem is its pressure is not enough. Due to its principles, so far the small brushless DC centrifugal pump currently provides the maximum pressure is 0.15Mpa. This is far less than the diaphragm pump’s pressure and cannot flush the fecal discharges clean. After numerous tests, we solved the problem perfectly using two of our brushless DC pumps in parallel. Two pumps in parallel can provide the maximum pressure of 0.27 MPa which is quite enough to flush the fecal discharges clean. Finally, this customer is very satisfied with our solution, and we signed a long-term cooperation contract.

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