3 Common Questions About Micro Diaphragm Liquid Pumps
Will water continue to flow out after the micro diaphragm liquid pump stops pumping?
The micro diaphragm liquid pumps produced by our company are equipped with check valves inside to prevent water backflow in the suction line. However, whether the discharge line will continue to drain depends on two situations:
- When the pump, suction port, and discharge port are at the same level, or the discharge port is higher than the suction port, the discharge line will not continue to drain.
- When the discharge port is lower than the suction port, the discharge line may continue to drain and even draw water from the suction line due to a physical phenomenon—siphon effect.
To prevent the discharge port from continuing to drain after the micro diaphragm liquid pump stops working, customers may consider adding an additional check valve in the pipeline, which can help prevent further drainage from the discharge line to some extent.
Can Hilin micro diaphragm liquid pumps pump boiling water?
Hilin micro diaphragm liquid pumps can pump boiling water, but continuous pumping will significantly shorten their lifespan and greatly reduce flow rate. Pumping high-temperature gas also affects flow rate and lifespan, but not as severely as pumping boiling water.
When pumping high-temperature water, the release of water vapor from the water can cause a significant drop in pumping flow rate. Although pumping high-temperature gas has a relatively lesser impact compared to boiling water, continuous use will still have a substantial effect. Whether pumping high-temperature gas or liquid, it is recommended to purchase customized high-temperature products and avoid continuous use.
Can micro liquid pumps be used to pump high-viscosity liquids?
If using our company’s micro liquid pumps to directly pump liquids, please note that our micro vacuum water pumps are designed for clean water. They are suitable for pumping media such as clean water with low to moderate viscosity. If the viscosity is too high, it may affect performance data and results.
Based on experimental experience, our micro vacuum water pumps can operate normally when pumping liquid media with viscosity similar to that of ink. However, if used to pump more viscous liquids, normal operation cannot be guaranteed, and the pump may even fail to work entirely. If used for short-term pumping of highly viscous liquids, it is recommended to flush the pump chamber with clean water after use to ensure longer and more stable operation.
For application scenarios requiring the pumping of high-viscosity liquids, it is recommended to use a micro vacuum pump to evacuate the gas from a vacuum container, creating a vacuum environment. The high-viscosity liquid can then be drawn into the container through negative pressure. By separating the gas and liquid paths, the high-viscosity liquid does not pass through the pump. Instead, the pump indirectly pumps the liquid by creating a vacuum negative pressure, thereby avoiding limitations imposed by liquid viscosity.
