Not required for a centrifugal by NFPA 20 and discouraged by NFPA 20 for centrifugals. Reference section 4.14.9.1 (4).
What's the pressure loss through the strainer? What's the pressure loss through the strainer when it's partially (or fully) clogged? Unless the reservoir is significantly higher than your pump, you may run into negative pressures at the pump inlet. Ed Kramer Littleton, CO > -----Original Message----- > From: [email protected] [mailto:sprinklerforum- > [email protected]] On Behalf Of Ed Cyr > Sent: Friday, June 03, 2011 8:58 AM > To: American Fire Sprinkler Association > Subject: Centrifugal Horizontal Split Case Fire Pump - Intake Screens or > In Line Strainer > > Forumites, > > > > I have used intake screens as prescribed by NFPA 20 in the past when > drawing > water for centrifugal fire pumps from a reservoir. > > Recently I have been asked to put in line strainers in the pump suction. > > Are they required when you have intake screens? > > The reservoir is being feed by a well. The reservoir is also lined with > a > membrane. > > My take is if any debris gets by the intake screens, it would be too > small > to damage the pump. A y strainer after the pump would filter any debris > that > might be detrimental to sprinkler performance. > > Any comments or suggestions would be appreciated. > > Thanks, > Ed Cyr > > *Alpha Fire Sprinkler Corporation* > > *San Luis Obispo**, CA*** > _______________________________________________ > 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:Sprinklerforum- > [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)
