I went to Patterson's factory 3 years ago and had a hands-on demo with Clarke, I wasn't really that impressed. The had a Cummins (I think) on their pump and it was just a test-bench setup but I remember they could set initial speed before the pressure switch took over. I know of a few around here that are set below range and wet stack badly, crankcase oil is always getting ruined. I don't think stall or idle becomes an issue with most (not sure about that) on start-up as it does once it's warmed-up and loaded. I just can't help thinking that $$$$ box can't be set for initial start RPM to keep you at/below 150 PSI (guessing) and then do it's magic. Is it a high speed engine? Turbo? Got a good engine guy locally?
Flamingo Lounge... I remember that place, I miss the old days of driving to PA and testing a whole bunch of pumps. I almost called you in August, broke down in Doylestown. Maiden voyage with the stroked 318 in my '64. Bent the arm on the fuel pump and she just died. Changed it out and kept going tho. 2 hour hiatus. Tom I'd be willing to bet Clarke's got deep discounts with Cla-Val. The Flamingo Martini Lounge- You and Timmy have been there, conveniently located just off Rte 15 on your way to Carlisle :) I think these are our 4th and 5th, feel free to ask. Also, Clarke has a brochure on them, maybe a Schirmer report. I don't believe there's another source besides Clarke, they've been the driver for all of them regardless of Auroura or Peerless pumps. When designing, primary concerns are avoiding dropping below stall speed at 1300 rpm +/- which results from larger pres differentials in static and flow. You can't cure a situation where your static is so high that you'd end up at 400 RPM to stay under your set point. Next is making sure there's a listed PLD version of your driver needed for your selected pres/capacity. Thought on one we'd have to use two 1500's to develop 3,000 demand, but ended up with a 2500 single that worked out past capacity. It still amazes me- what these storage protection criteria end up with in water supply needs. Ken, our design manager, stood next to a 17' header of 10" pipe with five 8" double-interlocked risers and commented "Remember when 8" and 10" were for UG?". The 10" header was fed by two runs of 8" overhead pipe 1/4 mile long. System demands just under 3,000. glc _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
