About metering pumps
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If feeding materials into the reactor continuously, is a metering pump a good choice? We are currently using a diaphragm metering pump, which produces pulses and often fails to deliver the material. Also, with a small feed volume, is it not suitable to use a metering pump?
Diaphragm metering pumps generate pulses; a pulse attenuation device can be installed to address this issue. If the material cannot be pumped, it might be due to its high viscosity, or perhaps there is too much back pressure in the reactor. Metering pumps are very suitable for applications requiring low flow rates, and they provide accurate liquid delivery, so they should be an excellent choice for your application. If there are no specific requirements regarding the flow rate per unit of time, other types of pumps could be considered
There are generally 2 types of metering pumps: diaphragm-type/plunger-type
Diaphragm-type plungers work just as well; that’s how our device is set up. One of the characteristics of this type of metering pump is its ability to deliver fluid to systems with high back pressure, while maintaining a low flow rate and high accuracy in flow measurement.
Yeah, could the metering pump be too small?
There is an automatic feeding system. It has very high precision and is very convenient. The price is moderate.
For the process mentioned by the original poster, metering pumps are generally used. As for the inability to process the material, it is necessary to analyze the specific reasons. If the viscosity is high, heating can be applied; the flow rate must also be selected appropriately, otherwise accurate measurement will not be possible. Also, the reaction vessel must be under positive pressure; otherwise, it will also lead to inaccurate measurement!
It also depends on the properties of the material you are using; if the material contains solid impurities, it is not suitable to use a metering pump. Low flow rates and high measurement accuracy are precisely the advantages of metering pumps. As for the issue of the material not being pumped, it may be caused by low pressure in the feed tank!
Using a metering pump is no problem.
Indeed, the material being conveyed is prone to crystallization; could this be the reason why the metering pump often fails to deliver the material? Also, does anyone have any information on the maintenance of metering pumps? Could you provide some conveniently? Thank you!
There is a 90% chance that the blockage is caused by crystallization. Options such as reducing the concentration, adding heat tracing, and improving insulation can be considered. Are there any special requirements for the daily maintenance of metering pumps? Looking forward to experts' advice.