Re: Pump selection

From: <Jacques>
Date: Thu Dec 02 2004 - 15:19:00 EST


You said 2 psig at 80F, not the same.

Jacques

   The liquid is a mixture of Benzene (80%), Xylene and Toulene. The stated boiling temperature of the mixture at 14.7 psia is 170 F. The vapor pressure of 2 psia at 80 F is only a derived number from a vendor. As a VOC the liquid is required to be stored under a nominal blanket of 5 in WC.

   Thank you for your interest.

     I think there is something missing here. Are you sure that the vapor pressure is 2 psig, this is extremely high, what kind of liquid is it, with a vapor pressure like that when the liquid is open to atmosphere then it will completely evaporate, there will be nothing left to pump. If the vapor pressure is correct, then you need to have this liquid under pressure which is a data that you have not given.

     Jacques

I am trying to find a suitable pump for a rather complex
application. The pump needs to be self priming as it has a lift of
14 feet. At 100 GPM I expect the total head to be 150 feet. It needs
to handle solids atleast 1/4 inch size, the vapor pressure of the
pump liquid is about 2 psig at 80 F which really cuts down on the
NPSH. And on top of it it would handle a VOC subject to NESHAP
requirements- meaning sealless or double seal pumps. I have already
rejected diaphragm type pump because of pulsations.
Any suggestions, generic or otherwise ?


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[Non-text portions of this message have been removed] Received on Thu Dec 02 15:19:00 2004

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