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Selecting the right pump for the application - v.14

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A whole lot of questions that a user or designer ought to ask before selecting a pump

Published in: Engineering
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Selecting the right pump for the application - v.14

  1. 1. Selecting the Right Pump Brian Gongol DJ Gongol & Associates, Inc. January 23, 2019 NWEA/NWOD/LONM Snowball Conference Kearney, Nebraska
  2. 2. How do we pick the right pump?
  3. 3. What are we pumping?
  4. 4. What are the flow and head conditions?
  5. 5. Is this a replacement or a blank-sheet job?
  6. 6. Are there site constraints?
  7. 7. Are there statutory/funding constraints?
  8. 8. Group 1: Solids | some solids | no solids
  9. 9. No solids
  10. 10. Minor/incidental solids
  11. 11. Reducible solids
  12. 12. Passable solids
  13. 13. Stringy solids
  14. 14. Group 2: Suitability to purpose
  15. 15. One condition forever?
  16. 16. Future conditions?
  17. 17. Relocation/portability?
  18. 18. Specialty fluids?
  19. 19. Trying to do one thing well?
  20. 20. Trying to do many things not so well?
  21. 21. Example: Risks with grinder pumps
  22. 22. Example: Duty and backwash w/same pumps
  23. 23. Group 3: Flexibility
  24. 24. Future conditions
  25. 25. New construction/industry
  26. 26. Pipe friction changes
  27. 27. Friction losses aren't just theoretical
  28. 28. Group 4: Maintainability
  29. 29. Can it be opened?
  30. 30. On-site, in-place?
  31. 31. Requires a service shop?
  32. 32. Modifications to piping for removal?
  33. 33. Do you get advance warning?
  34. 34. Visible indicators
  35. 35. Oil sight glasses
  36. 36. Seal failure warnings
  37. 37. Group 5: Wearing concerns
  38. 38. Chemicals
  39. 39. Inorganic solids
  40. 40. Corrosion
  41. 41. Cavitation
  42. 42. Group 6: Four types of curves
  43. 43. Steep system, steep pump
  44. 44. Steep system, flat pump
  45. 45. Flat system, steep pump
  46. 46. Flat system, flat pump
  47. 47. Group 7: Systemic questions
  48. 48. Duty only
  49. 49. Duty and jockey
  50. 50. Paced flow
  51. 51. Hydro-pneumatic tanks
  52. 52. Staged/series
  53. 53. Parallel
  54. 54. Parallel/series
  55. 55. Group 8: Total life-cycle cost
  56. 56. Hydraulic efficiency
  57. 57. Energy use
  58. 58. Maintenance efficiency
  59. 59. Expected useful life
  60. 60. Cost of downtime
  61. 61. Total system efficiency (TSE) A much larger question than simple hydraulic efficiency
  62. 62. TSE Component 1: Hydraulic efficiency  Does it use electricity efficiently?  Does it use people efficiently?  Does it use money efficiently?  Will it let you down in an emergency?
  63. 63. Clearances
  64. 64. Vanes
  65. 65. Coatings
  66. 66. Straight pipe
  67. 67. Suction diffusers
  68. 68. TSE Component 2: Maintenance efficiency  Does it use electricity efficiently?  Does it use people efficiently?  Does it use money efficiently?  Will it let you down in an emergency?
  69. 69. Preventive/predictive maintenance
  70. 70. Knowledge-building through maintenance A practiced operator is a safer operator
  71. 71. Interchangeability of parts
  72. 72. Special tools to maintain
  73. 73. Special training to operate or maintain
  74. 74. Maintenance-friendly site layout
  75. 75. TSE Component 3: Durability/longevity  Does it use electricity efficiently?  Does it use people efficiently?  Does it use money efficiently?  Will it let you down in an emergency?
  76. 76. How long will it last?
  77. 77. Longevity with maintenance
  78. 78. Longevity without maintenance
  79. 79. Can the system survive periods of neglect?
  80. 80. TSE Component 4: Backup operations  Does it use electricity efficiently?  Does it use people efficiently?  Does it use money efficiently?  Will it let you down in an emergency?
  81. 81. Backup power
  82. 82. Backup pumps (on the shelf)
  83. 83. Backup parts (individually)
  84. 84. Backup parts kits (seals, rotating assemblies)
  85. 85. ** Examples **
  86. 86. Recessed lift station (140 gpm @ 50' tdh)
  87. 87. WWTP process (325 gpm @ 13' tdh) - sludge
  88. 88. Booster pump (14,000 gpm @ 130' tdh)
  89. 89. RDT wash booster pump (50 gpm @ 75' tdh)
  90. 90. Snow-making application  160 gpm @ 800' tdh  240 gpm @ 825' tdh  320 gpm @ 870' tdh
  91. 91. Brine waste (900 gpm @ 99')
  92. 92. Low-flow booster station (28,240' of pipe)  31 gpm @ 142' tdh  48 gpm @ 178' tdh
  93. 93. Portable (1000 gpm @ 20' tdh) - stormwater
  94. 94. Sewage lift station (300 gpm @ 50' tdh)
  95. 95. Combined sewer/high I&I  2,000 gpm @ 50' tdh  5,000 gpm @ 75' tdh
  96. 96. Questions?  Thank you for your time!  Brian Gongol  DJ Gongol & Associates  515-223-4144  www.gongol.net  info@gongol.net  @djgongol on Twitter  facebook.com/djgongol
  97. 97. Credits  Images of RDT pump and portable engine-driven pump courtesy AMT Pump  Cutaway illustration of atmospheric seal chamber courtesy The Gorman-Rupp Co.  Computer-generated pump curves are the work of the manufacturers indicated on those curve illustrations  All other photographs are original work of the author and may not be used without express written permission; all rights reserved

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