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How to choose the right valve for pump control

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How to choose the right valve for pump control

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How to choose the right valve for pump control

  1. 1. HOW TO SELECT THE RIGHT VALVE FOR PUMP CONTROL Brian Gongol DJ Gongol & Associates, Inc. July 18, 2014 Heartland Ops Conference Kearney, Nebraska
  2. 2. Dangerous things to do
  3. 3. Get between Donald Trump and a camera
  4. 4. Follow too closely on the Interstate
  5. 5. Butt dial
  6. 6. Try to classify valves comprehensively
  7. 7. Lots of ways to try  Slide  Rotary  Globe  Swing  Sphere  Diaphragm  Sleeve  Vertical-lift  Operator/actuation  Seating  Action  Direction of flow  Degree of rotation  Allowable leakage  Number of ports
  8. 8. But let's try a different way  Slide  Rotary  Globe  Swing  Sphere  Diaphragm  Sleeve  Vertical-lift  Operator/actuation  Seating  Action  Direction of flow  Degree of rotation  Allowable leakage  Number of ports
  9. 9. Primarily: Purpose What are we trying to make happen?
  10. 10. Protection
  11. 11. Management
  12. 12. Energy control
  13. 13. Secondarily: Means How are we going about doing it?
  14. 14. Stopping flow
  15. 15. Throttling flow
  16. 16. 1: Protecting by stopping (prior to pump) 1
  17. 17. Foot valve Usually attached to a screen
  18. 18. Silent check valve
  19. 19. Suction-side check valve
  20. 20. 1: Protecting by stopping (prior to pump)  High risk of clogging  Introduces friction losses  NPSH considerations (raises TDSL)  Net energy impact: Priming protection vs. friction losses
  21. 21. 2: Protecting by stopping (after pump) 2
  22. 22. Three basic types of post-pump check valve
  23. 23. Swing check
  24. 24. Lift check
  25. 25. Ball check
  26. 26. Lever-and-weight check
  27. 27. Cushioned check
  28. 28. Tilting-disc check
  29. 29. 2: Protecting by stopping (after pump)  What's holding it closed?  Weight of the ball, spring strength, disc weight  External controls or moving parts?  Internal surface flow obstruction  Adjustability  Seating tightness
  30. 30. 3: Protecting by stopping and throttling 3
  31. 31. Electric check
  32. 32. Throttling check
  33. 33. Tilting-disc check with buffers
  34. 34. 3: Protecting by stopping and throttling  Controlling or dampening pump startup  Controlling or dampening pump shutdown  Immediacy of closure on power loss
  35. 35. 4: Managing by stopping 4
  36. 36. Gate valves
  37. 37. Gate valves  Gate valves  Knife-gate valves  Resilient-wedge gate valves  Double-disc gate valves
  38. 38. Water-control gates
  39. 39. Water-control gates  Slide gates  Weir gates  Sluice gates
  40. 40. 5: Managing by stopping and throttling 5
  41. 41. Ball
  42. 42. Plug
  43. 43. Butterfly
  44. 44. Rotary pump control
  45. 45. Pinch
  46. 46. Cone
  47. 47. 5: Managing by stopping and throttling  Solids passage  Tightness of seal  Seating type  Coefficient of friction (Cv) versus clear opening  Ease of seal/seat replacement
  48. 48. 6: Energy control to protect (air) 6
  49. 49. Air-release (high-volume)
  50. 50. Vacuum-break
  51. 51. Air/vacuum
  52. 52. Air-release (low-volume)
  53. 53. Combination
  54. 54. 6: Energy control to protect (air)  Potential for air accumulation  Head to overcome on startup  Weight of water column if held by vacuum  Sidewall thickness of pipe  Age of pipe
  55. 55. 7: Energy control to protect (flow) 7
  56. 56. Surge-relief
  57. 57. Surge-anticipator
  58. 58. 7: Energy control to protect (flow)  Abruptness of startup  Abruptness of shutdown  Momentum of water column  Tendency to vaporize  Pipe friction and tendency to dissipate
  59. 59. 8: Energy control to manage 8
  60. 60. Pressure-reducing
  61. 61. Pressure-sustaining
  62. 62. Flow-control
  63. 63. Emergency cut-in
  64. 64. Altitude
  65. 65. 9: Highly specialized 9
  66. 66. 9: Highly specialized  Needle  Solenoid  Pilot
  67. 67. 10: Backflow prevention 10
  68. 68. To recap  Protection by stopping  Protection by throttling  Protection by energy control  Management by energy control  Management by throttling  Management by stopping
  69. 69. Questions?  Thank you for coming!  Brian Gongol  DJ Gongol & Associates  515-223-4144  info@djgongol.com
  70. 70. References  Most valve images are courtesy of GA Industries  All other images are original work by and copyright reserved to Brian Gongol

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