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  • Users: alexcmmi
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  1. alexcmmi

    Agricultural Runoff Treatment System?

    Somewhat unique situation here. Large animal facility in fully developed, built out, urban area. Run off currently discharges into municipal storm drainage system which in turn dishcarges to surface water, and there is coliform and turbidity proglems. Need to treat large volume of storm...
  2. alexcmmi

    Backflow Preventer in Pump Suction

    Municipal Water Distribution Application - Potable Water We are trying to design a very basic water booster station to provide adequate pressure to a proposed development located 'up a hill'. Pump station is to be designed w. 1 jockey, 2 duty and 1 high flow pumps. Minimum suction pressure...
  3. alexcmmi

    Check Valve for Water Booster Station - experience with..

    We spec'd out GA Series 250 Air cushioned swing check valves. The contractor submitted val matic surgebuster tilted disc check valves. Application is raw water. There are several locations throughout the delivery system where the valves will be needed...mostly 12", flows base 2604 gpm. Any...
  4. alexcmmi

    Velocity through check valve - max and min

    A supplier brought to my attention that I had an unusually high velocity going through a check valve in a PS design I was working on... Pump is split case, 10" suction x 8" discharge. Design point is 2604 gpm at 177'. Service is raw (high quality) water, 60 deg F - nothing out of the...
  5. alexcmmi

    Vertical Turbine - Bearing Spacing

    My question is w. regards to max bearing spans for use in a VT pump Application is raw water through a Ranney collector well (so screened and river bed filtered). 40 to 65 deg F. Should be very good quality raw water. Pumps are 300 HP, design operating point is 2604 GPM at 328' TDH. Most of...
  6. alexcmmi

    Design of Water / Wastewater Treatment plant to B31.3?

    Not sure how these forums work. I have a question as to B31.3 and posted it here: http://www.eng-tips.com/viewthread.cfm?qid=232572&page=1 even though the more appropriate respones may come from ppl in this forum. Thank you and sorry for the cross post
  7. alexcmmi

    Designing a Water / Wastewater Treatment Plant to ASME B31.3

    Kind of general question as to the design of a water or wastewater treatment plant to B31.3 standards. Does B31.3 apply to water / wastewater treatment plants? Is it applicable? How does B31.3 relate to AWWA standards? I know this is incredibly vague. Just want to see if anyone has any...
  8. alexcmmi

    Horizontally Mounted Gate Valve - roller & scraper

    Are rollers and scrapers used in large diameter (>12")resilient seat gate valves that are mounted horizontally? I know they were used in double disc, but what about resilient seat? What happens to sediments that might deposit on the seating surface? How is this removed? Appreciate any tips...

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