I have used double-seal pumps with an external reservoir and seal-less
(magnetic drive) centrifugals (such as by Crane)for similar service,
with great success. The mag drive pumps are more cost to purchase to to
operate, but maintenance is about nil.
... Bruce D. Bullough ...
Sebesta Blomberg & Associates, Inc.
2381 Rosegate
Roseville, MN 55113 USA
+ 651-634-7344
www.sebesta.com
-----Original Message-----
From: Jacques Chaurette [mailto:jchaurette@fluidedesign.com]
Sent: Thursday, December 02, 2004 4:51 PM
To: <a href="/group/PipingDesign/post?postID=NBzpFtJNPrUh4axAykul4y0jwlJ6A1LVe7jmQc0J4ersVG9zK4We03VSb3x71TCiB0ojQeVti7n8n6GXT7kRnvjwqYg">PipingDesign@yahoogroups.com</a>
Subject: Re: [PipingDesign] Pump selection [bcc][faked-from][mx][spf]
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.
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 ?
=========================================
PipingOffice - Excel Spreadsheets for Piping Calculations
<a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a>
=========================================
Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>
Yahoo! Groups Sponsor
ADVERTISEMENT
------------------------------------------------------------------------
------
Yahoo! Groups Links
a.. To visit your group on the web, go to:
<a href="http://groups.yahoo.com/group/PipingDesign/">http://groups.yahoo.com/group/PipingDesign/</a>
b.. To unsubscribe from this group, send an email to:
<a href="/group/PipingDesign/post?postID=6h2174oXMJHM1JZ3LcxspZsJGta6gKD1NoSiTadhDeAM47BLecjfs4zhOG-vG9xCh-EBqvS3FCqoGAgJQ9XU_OGLHUpzlQ9KvCrqW8NhGT2Shjk">PipingDesign-unsubscribe@yahoogroups.com</a>
c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms
of Service.
[Non-text portions of this message have been removed]
PipingOffice - Excel Spreadsheets for Piping Calculations
<a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a>
=========================================
Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>
Yahoo! Groups Sponsor
ADVERTISEMENT
------------------------------------------------------------------------
------
Yahoo! Groups Links
a.. To visit your group on the web, go to:
<a href="http://groups.yahoo.com/group/PipingDesign/">http://groups.yahoo.com/group/PipingDesign/</a>
b.. To unsubscribe from this group, send an email to:
<a href="/group/PipingDesign/post?postID=6h2174oXMJHM1JZ3LcxspZsJGta6gKD1NoSiTadhDeAM47BLecjfs4zhOG-vG9xCh-EBqvS3FCqoGAgJQ9XU_OGLHUpzlQ9KvCrqW8NhGT2Shjk">PipingDesign-unsubscribe@yahoogroups.com</a>
c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms
of Service.
[Non-text portions of this message have been removed]
PipingOffice - Excel Spreadsheets for Piping Calculations
<a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a>
=========================================
Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>
Yahoo! Groups Sponsor
ADVERTISEMENT
------------------------------------------------------------------------
------
Yahoo! Groups Links
a.. To visit your group on the web, go to:
<a href="http://groups.yahoo.com/group/PipingDesign/">http://groups.yahoo.com/group/PipingDesign/</a>
b.. To unsubscribe from this group, send an email to:
<a href="/group/PipingDesign/post?postID=6h2174oXMJHM1JZ3LcxspZsJGta6gKD1NoSiTadhDeAM47BLecjfs4zhOG-vG9xCh-EBqvS3FCqoGAgJQ9XU_OGLHUpzlQ9KvCrqW8NhGT2Shjk">PipingDesign-unsubscribe@yahoogroups.com</a>
c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of
Service.
[Non-text portions of this message have been removed]
PipingOffice - Excel Spreadsheets for Piping Calculations
<a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a>
=========================================
Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>
Yahoo! Groups Sponsor
ADVERTISEMENT
------------------------------------------------------------------------
------
Yahoo! Groups Links
a.. To visit your group on the web, go to:
<a href="http://groups.yahoo.com/group/PipingDesign/">http://groups.yahoo.com/group/PipingDesign/</a>
b.. To unsubscribe from this group, send an email to:
<a href="/group/PipingDesign/post?postID=6h2174oXMJHM1JZ3LcxspZsJGta6gKD1NoSiTadhDeAM47BLecjfs4zhOG-vG9xCh-EBqvS3FCqoGAgJQ9XU_OGLHUpzlQ9KvCrqW8NhGT2Shjk">PipingDesign-unsubscribe@yahoogroups.com</a>
c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of
Service.
[Non-text portions of this message have been removed]
Yahoo! Groups Sponsor
ADVERTISEMENT
------------------------------------------------------------------------
Yahoo! Groups Links
a.. To visit your group on the web, go to:
<a href="http://groups.yahoo.com/group/PipingDesign/">http://groups.yahoo.com/group/PipingDesign/</a>
b.. To unsubscribe from this group, send an email to:
<a href="/group/PipingDesign/post?postID=6h2174oXMJHM1JZ3LcxspZsJGta6gKD1NoSiTadhDeAM47BLecjfs4zhOG-vG9xCh-EBqvS3FCqoGAgJQ9XU_OGLHUpzlQ9KvCrqW8NhGT2Shjk">PipingDesign-unsubscribe@yahoogroups.com</a>
c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of
Service.
[Non-text portions of this message have been removed]
<a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a> =========================================Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>
Yahoo! Groups Links Received on Fri Dec 03 10:53:00 2004
This archive was generated by hypermail 2.1.8 : Tue Mar 04 2008 - 11:40:38 EST