Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering

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combination of 6/4 and 4/3 slurry pumps in series (2 replies)

m
bolka
6 years ago
bolka 6 years ago

hi all

one of my colleagues asked a question about series some slurry pumps with various sizes like as combination of 1*6/4 AH WRT pump with 2*4/3 AH pumps in one series!!

i think its very strange but is it possible combine various sizes of slurry pumps together?

Mike
6 years ago
Mike 6 years ago
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2 likes by bolka and David

The answer is, yes he can do it, but he needs to be sure that the feed head/pressure to the last pump is less than the head/pressure rating of the seals, and connections.  Putting pumps in series to achieve a higher head is a common practice, regardless of the type of pump.  Most slurry pumps are centrifugal (rotating impeller) the actual output will depend on the the feed head (note there are some other factors that impact this also). So you also need to check the pumps design rating.

The issue is the pump size (a 6/4 WRT has a 6" inlet and a 4" outlet, and the 4/3 AH is 4" inlet and 3" outlet.  This will impact the volume that can be pumped and also the discharge head produced.  the 6/4 is a larger pump capable of greater volume, while the 4/3 has a lower volumetric capacity.  The system as described will be limited to a volume of less than the volume of the smallest pump.  And the smaller pumps will act as control valves on the larger pump performance so the total head will be less than the additive of each pump.  

M
Mike Rockandel
6 years ago
Mike Rockandel 6 years ago
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2 likes by bolka and David

When selecting pumps there always is give and take. A larger pump at low rpm or smaller pump at high rpm. A series of pumps geographically spaced could have different head requirements due to contours. Economics could favor smaller pumps at higher rpm when TDH requirements increase

http://www.rockandel.com/

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