Todd , Is this a vertical "in-line" pump taking suction from a municipal supply or a vertical turbine which will have a shaft down in a reservoir or wet pit ? If it is the latter the pressures will vary above the former.
LV ---- Todd Williams <[email protected]> wrote: > I'm more sizing a pump for bidding than drawing it at this point . > I'm not of what pump will be used, so I'm nervous about using > specific curves. The flows on this job are about 300 gpm and I'm > using a 500 gpm pump. Most of the VT pumps I've used have demands > greater than the rated flow. Think I'll play it safe and assume 120%. > > > > At 02:52 PM 6/3/2010, you wrote: > >Todd: > > > >140 is the maximum allowed, but most pumps that I've encounter - > >horizontal and vertical - are closer to 120% of rating at churn. But > >definitely go to the data sheets because many curves are steeper than > >others ... > > > >Steve Leyton > >Protection Design & Consulting > >San Diego, CA > > > > > > > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of Michael > >Gallello > >Sent: Thursday, June 03, 2010 11:51 AM > >To: [email protected] > >Subject: RE: vertical pump - theory vs reality > > > >140% is the NFPA throw at it if I remember correctly. I've never gone > >with the 120/140 or whatever that NFPA "suggests". Size your pump, pick > >one, check out the performance curve from the manufacturer. Tada. ;-) > > > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of Todd > >Williams > >Sent: Thursday, June 03, 2010 2:48 PM > >To: [email protected] > >Subject: vertical pump - theory vs reality > > > >I am designing a system with a vertical turbine pump. When figuring > >churn pressure, is 140% of rated match what happens in reality? My > >design has low flow, but high pressure. > > > >Todd G. Williams, PE > >Fire Protection Design/Consulting > >Stonington, CT > >860.535.2080 > >www.fpdc.com > > > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > >For Technical Assistance, send an email to: [email protected] > > > >To Unsubscribe, send an email > >to:[email protected] > >(Put the word unsubscribe in the subject field) > > > > > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > >For Technical Assistance, send an email to: [email protected] > > > >To Unsubscribe, send an email > >to:[email protected] > >(Put the word unsubscribe in the subject field) > > > > > >__________ Information from ESET NOD32 Antivirus, version of virus > >signature database 5170 (20100603) __________ > > > >The message was checked by ESET NOD32 Antivirus. > > > >http://www.eset.com > > > > > > > >__________ Information from ESET NOD32 Antivirus, version of virus > >signature database 5170 (20100603) __________ > > > >The message was checked by ESET NOD32 Antivirus. > > > >http://www.eset.com > > > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > >For Technical Assistance, send an email to: [email protected] > > > >To Unsubscribe, send an email to:[email protected] > >(Put the word unsubscribe in the subject field) > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, CT > 860.535.2080 > www.fpdc.com > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
