Why are the prices of centrifugal pumps with low flow rates but high head so high?
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Our systems are of small scale, with low material flow rates, but high head requirements. Yet why is it difficult to select centrifugal pumps for low flow rates and high heads? There are very few pump models available, and their prices are even higher than those of larger pumps
These pumps are expensive and prone to breaking. My previous employer used a pump with low flow rate but high head to replace the original multi-stage centrifugal pumps during technical upgrades. This type of pump tends to overheat easily during operation, requires frequent repairs, and has low efficiency, typically around 40%.
The design and manufacturing of pumps with low flow rates but high head present significant challenges; the hydraulic calculations as well as the mechanical calculations related to the shaft system are complex. During manufacturing, the large diameter of the impeller together with narrow flow channels makes further processing very difficult, which often requires the use of precision casting. So the price is very high.
Are you referring to a pitot pump? Low flow rate, high head. Our company has this product.
You said your company has such pumps; could you tell me something about your company?
The analysis is quite reasonable; due to the high specific speed of this pump’s impeller, the complex flow channel structure, and the difficulties in manufacturing, its price is relatively high
I can send you a sample to take a look at.
You can upload it to the “Sample Upload Area” and then send a link to this post.
Consider using a Suntain high-speed centrifugal pump; the price is a bit high. However, it has good performance, and it is also easier to maintain than multi-stage pumps.
Shenyang Erpump, Dalian Danai, Dalian Deep Blue – these are the companies I know that produce pumps for low flow rates and high head pressures.
You can choose a vortex pump or a plunger pump; it has a lower flow rate but a very high head pressure