Pump Selection: Manual vs. Existing Pump

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    Centrifugal Pump
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Discussion Overview

The discussion revolves around the selection of a pump for a specific application, comparing a manual recommendation with an existing pump. Participants explore the implications of pump size, capacity, and operational parameters, focusing on the suitability of the pumps based on their specifications and performance history.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Exploratory

Main Points Raised

  • One participant suggests opting for the larger pump, citing it as the best value.
  • Another participant questions the implications of using a larger centrifugal pump, emphasizing the need for specific performance data such as pump curves and operational tags.
  • A participant provides detailed specifications of the original and new pumps, noting differences in power, flow rate, and head, and expresses a preference for the original pump based on its compatibility with system requirements.
  • The importance of maximum operational pressure is highlighted, with a focus on ensuring it exceeds 13 bars to avoid damaging materials.
  • Concerns are raised about potential system damage if the larger pump is used without proper consideration of its specifications.

Areas of Agreement / Disagreement

Participants do not reach a consensus on which pump to select, with differing opinions on the implications of pump size and capacity. The discussion remains unresolved regarding the best choice for the application.

Contextual Notes

Participants express uncertainty regarding the specific operational parameters and performance history of the pumps, which may influence the decision. There is also a lack of clarity in the initial question posed, leading to varied interpretations.

Who May Find This Useful

Individuals involved in pump selection for industrial applications, engineers considering pump specifications, and those interested in the operational implications of pump performance.

maxx_payne
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accordin to my last to posts here i found this special pump which has materials designed to carry a high press but the problem now
i found a pump on the machine is bigger than the one in the manual
so shall i buy the pump from manual or as the existing pump ?
 
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What?
 
I'd go for the larger pump, obviously. Best value.
 
That's not the case with Centrifugal pumps.

When you say larger, what do you mean? Check the tags on it. Do you have the curve for your specific pump? These are things that people would need to know to give you advice.

Vespa, if you have a pump designed for 100 gpm at 80 ft of head, and you use a pump that has a capacity of, say, 500 gpm at 80 ft, then you could potentially damage components, overflow/drain systems, all sorts of stuff can happen.

Specifically, what is different. Numbers help us help you, as well.
 
Size matters. Apart from that, the question asked was somewhat obscured in unclear words, and unrelated phrases. The better followup-question would be: "What?".
 
i am very sorry for unclear description but the original pump in the manual was
2.2 kw has q=12m3/hr and H = 20 m
the new pump they put is 10hp q=20m3/hr and H= 40 m and while its operatin on the machine it gives 25 meter head only not 40
the sitiuation now is that i have searched for these pumps history and i found out that this first pump was used for 6 years and the other pumps for 4 years
the main principle in my problem os the maximum op pressure which should be more than 13 bars as u know to make the materials withstand this pressure
so finally i decided to buy the pump of 2.2 kw
which will be cheaper and also the pump curve is very good also covering my conditions and i will prevent destroying of any other element in the system
is it clear now ??
and am i right in my sellection ??
 

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