Ross Mackay Forum Moderator 94 Posts
Re: Deciding between screw-type pumps and centrifugal pumps30 July 2008 at 1:29pm
With pumping conditions such as you quote, it will be necessary to use a positive displacement pump of your choice. The centrifugal pump is unsuitable as the efficiency correction factor is likely to be below 50%, regardless of the pressure you will be developing, which you didnt identify.
I am designing a pump with a flow rate of 6.5 m3/hr for two different grades of oil. The first type has a viscosity 200 cSt and is used for half of the year, while the second type has a viscosity of 25 cSt and is utilized during the second half of the year. I would prefer to have the same pump design for both grades of oils. Should I use a screw-type pump or a centrifugal pump?
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