Yes, I am looking into Gould 3796. An Initial positive response on Gorman-Rupp
U3B65-B from the vendor has tapered off due to limitations. Have you or anybody
else have heard about self priming pumps from RS Corcoran ?
----- Original Message -----
From: Jacques Chaurette
To: <a href="/group/PipingDesign/post?postID=JGSvizeR6Q8fWcOb7mFdVYSiY6Eq6SIhW_bO2H35nT38rUCoNR6luX-JzjUZc_dhoclBFxYmPVa8l_Wsv4lgvCSLDmk">PipingDesign@yahoogroups.com</a>
Sent: Thursday, December 02, 2004 4:50 PM
Subject: Re: [PipingDesign] Pump selection
Now that we have the vapor pressure sorted out this does not seem like too difficult an application. It seems to me that a self-priming centrifugal pump by Gorman-Rupp or Goulds will do the job, they don`t normally come with these types of seals but maybe they can be installed.
Jacques
Yes, you are right. It is 2 psia. Not 2 psig.
----- Original Message -----
From: Jacques Chaurette
To: <a href="/group/PipingDesign/post?postID=JGSvizeR6Q8fWcOb7mFdVYSiY6Eq6SIhW_bO2H35nT38rUCoNR6luX-JzjUZc_dhoclBFxYmPVa8l_Wsv4lgvCSLDmk">PipingDesign@yahoogroups.com</a>
Sent: Thursday, December 02, 2004 2:19 PM
Subject: Re: [PipingDesign] Pump selection
You said 2 psig at 80F, not the same.
Jacques
----- Original Message -----
From: Chicago
To: <a href="/group/PipingDesign/post?postID=JGSvizeR6Q8fWcOb7mFdVYSiY6Eq6SIhW_bO2H35nT38rUCoNR6luX-JzjUZc_dhoclBFxYmPVa8l_Wsv4lgvCSLDmk">PipingDesign@yahoogroups.com</a>
Sent: Thursday, December 02, 2004 11:35 AM
Subject: Re: [PipingDesign] Pump selection
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 18:51:00 2004
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