NFPA 20 still requires a relief valve for diesel drivers IF the run- away (applied as a percentage of churn) causes excessive pressure.
Roland On Apr 6, 2010, at 2:52 PM, Tom Duross wrote: > I can really see that coming when you sit down and think about the > water you > use and waste. 1 bldg. for instance: Just the 19 flrs above and 6 > below we > probably use 12K gal per quarter. Then the pump test and I'm frugal > and > fast but you still end up using 6K. In 3 years when every pr hose > valve has > to be done, holy moly. They have grey water; roof drains are used for > toilets. I asked, and posted here, but more science will have to be > done to > treat the yuck in the water for reuse. I don't really see the wfs > recirculators being used too much around here but they're definitely > a help. > > Looked at a pump yesterday with a relief dripping into the parking > lot. > It's from the time when they put them in to guard against > overspeed. The > pump churned 165 so they really didn't need it but I suggested they > have the > controller rep come in and see about installing an overspeed alarm. > The > easy was to just remove it but not really. I was surprised actually > because > the installing company were famous for piping them to suction but > they must > have had an engineer who looked at the shops and went to the site. > Tom _______________________________________________ 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)
