Problem of metering pump not delivering flow

The reasons why a metering pump does not deliver fluid are as follows: 1. Blockage in the inlet pipeline; 2. Insufficient level of the liquid to be pumped; 3. A filter at the pump’s inlet may be clogged by impurities; 4. The pump typically has a ball-shaped steel bead that acts as a check valve. If the medium being transported is highly corrosive, this steel bead can corrode and stick to the opposite end face, preventing fluid flow. I think in your case it’s usually the third or fourth type, because the first two are quite basic mistakes that can generally be detected quite easily, but the third and fourth types aren’t so obvious. The third treatment method is simple: it involves cleaning the filter. As for the fourth method, it’s even simpler: just use an F wrench to strike it hard for a few minutes and that’s it. I often do this, and it always works. Since our metering pump dispenses 25% alkaline solution, we often encounter this situation. Just knock on it hard and that’s it; hope this helps you.

What materials are you transporting? Is the pump piston-type or diaphragm-type? The reasons analyzed upstairs are good. We have encountered situations where material couldn’t be pumped due to damaged diaphragms, and this is also not something that easily catches attention. This situation usually manifests as a sudden rise in the liquid level in the pump head tank, indicating that material has seeped in. Hope this helps

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I recommend the Mitrato metering pumps made in the United States – they offer high precision and are quite durable. Internal leakage or damage to the check valves in the metering pump can also cause it to fail to deliver fluid

The metering pumps from Chongqing Pump Factory seem to be okay

If transporting alkaline water, replacing the steel balls with ceramic balls can extend their lifespan.

The Mintonlo metering pump is also good~ I’m sorry, but there isn’t enough space

##The metering pumps are good; our unit has used several of them and the performance is satisfactory.

For transporting materials that are prone to vaporization, the type of pump isn’t that important; the key is to prevent the materials from vaporizing. In the past, our company used centrifugal pumps to transport BD, and every time the pump was stopped and started again, it failed to deliver the required volume of fluid, requiring a long time to resolve the issue. We took the following measures to solve this problem: 1. Increase the liquid level in the output tank appropriately； 2. Find ways to increase the pressure at the pump inlet: (raise the temperature at which the material is stored, or introduce N2 to increase the pressure). 3. If conditions permit, install cooling systems in the pipelines at the pump inlet and outlet ；

##The metering pump is good, with a low maintenance rate