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Floating Ball Valve

Floating Ball Valve. Team DHMO: Barry Schnorr David Harrison Justin Ferrentino Haixian Huang. Introduction. Create a flow control device that: Controls a constant flow rate of 20 L/day Is inexpensive to manufacture Can be connected after a slow sand filter (resistant to clogging)

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Floating Ball Valve

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  1. Floating Ball Valve Team DHMO: Barry Schnorr David Harrison Justin Ferrentino Haixian Huang

  2. Introduction • Create a flow control device that: • Controls a constant flow rate of 20 L/day • Is inexpensive to manufacture • Can be connected after a slow sand filter (resistant to clogging) • This requires control of flow before the water level of constant head

  3. Floating Ball Valve Calculations Float constraint: Fbuoyant – Fgravity > Fpressure ht dt df ρf ρw

  4. Head Loss Tubing So: use 1m of 1/16 in. inner-diameter tubing to achieve 17cm of headloss

  5. Components • Racquet Ball • 1/4” Steel Tubing • 1/4” PVC Tubing • 1/16” PVC Tubing

  6. Costs

  7. Device in Operation

  8. Results from Testing Graph of Flow Rate vs. Reservoir Water Level

  9. Results Cont’d Graph of Flow Rate vs. Reservoir Water Level

  10. Results Cont’d Graph of Flow Rate vs. Tube Height (Range of Flow Rates Produced)

  11. Results Cont’d Flow Rates of Dirty Water over Time

  12. Results Summarized • Flow rate varied ~ 0.5 L/day from height change of water in bucket • As built, device was able to provide flow rates from around 5 to 50 L/day • Over the time device was tested with dirty water, it did not appear to be significantly affected

  13. Conclusions • Easy to construct • Easy to calibrate • Able to produce flow rates over a large range • Able to produce roughly constant flow from a filled 5 gallon bucket

  14. Recommendations • Long term testing with dirty water • Standardized construction • Screw apart bottle for cleaning • Plastic rather than steel tube (save costs) • Way to attach head loss tubing simply • Bottle mounting w/ SSF

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