Lime Transfer Pump Underachieving

[MMCV]

Hi Folks

I have a lime transfer pump installed at a municipal site and it should be achieving 8 LPS @ 4 mtrs head, it is a 1.1kw 2900 rpm motor, the pump is only achieving 1 LPS and to be honest its got me pretty confused. [URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1456957128/tips/S28C-6e16030308130_gzrxmr.pdf[/url]

 

[Artisi]

Insufficient information. You will need to fully describe the in's & out's of
the installation.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[LittleInch]

Working at ahigher head (12m)????

Need to know much more about set up and operating pressures / head

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[DrClassic]

You'd better include a schematic of the pumping system to help you find the problem .

 

[ashtree]

MMCV

Given that you are pumping lime i assume you are actually pumping a lime "slurry" or a fairly concentrated solution.
These type of installations are notorious for three things.

1) Blocking and clogging of the pipework. This will increase the head dramatically on the pump which ultimately causes reduced flow.
2) The intake becoming clogged or blocked by precipitation of the lime slurry in the supply tank due to poor mixing.
3) Dry running caused by one or both of the above damaging the pump.

Regards
Ashtree
"Any water can be made potable if you filter it through enough money"

 

[MortenA]

How is the volume flow measured? If its e.g. an orifice then maybe its a bad flow measurement of the flow (blocked instrument tubing=less flow measured than actual)?

 

[QualityTime]

Lime slurry will precipitate calcium carbonate on all of the piping and the inside of the pump. Eventually the whole thing will plug up. It will be a continual maintenance nightmare. There are ways to get around this without using a pump

 

[LittleInch]

From the OP "its got me pretty confused. "

It's got the rest of us a bit cheesed off that the OP hasn't bothered responding to any of the posts..... hasn't looked since 6th March and isn't notified of any posts - waste of time doing anything more here I think.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Artisi]

typical of first time posters, there is a case that after joining that there is no posting for a week.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)