Pacific Railroad
Preservation Assoc.

2016 Boiler Rebuild for the SP&S 700

Superheater Pipe Sponsorship Fundraiser

What is a superheater?

The boiler of the SP&S 700 has 186 flue tubes of 3.75" diameter and 54 more of 2.00" diameter. These 21' tubes carry the hot exhaust fumes from the firebox to the smokebox. Nestled within each of the larger tubes is another pair of pipes connected at the firebox end by a "U"-shaped return casting. This inner assembly is called a superheater. Within the smokebox, one of the pipes from each superheater is joined in a manifold called the superheater header while the other pipe leads to a similar manifold at the throttle box.

What does a superheater do?

The short answer is that superheaters convert "wet" steam into "dry" steam. For a better understanding, let's follow the steam in an operating engine. We've already mentioned that the flue tubes channel the hot exhaust fumes from the firebox to the smokebox. As they do so, they transfer heat from fumes to the boiler water. As the water gets hotter and hotter, it eventually boils, creating "wet" steam and raising the pressure. Now when the engineer opens the throttle, this wet steam leaves the boiler, travels down the dry pipe, and enters the superheater header in the smokebox. The path of the steam there divides, leading through the 186 individual superheaters. While passing through the superheaters, the wet steam's temperature is raised several hundred degrees and it becomes known as "dry" steam because it is no longer on the verge of condensing into water. The dry steam next exits the superheater, passes through the throttle body and enters the steam chests and cylinders, where it provides the motive force of the locomotive. Dry steam is superior to wet steam for powering the locomotive because it provides higher thermal efficiency and is less likely to condense within the piping and cylinders.

Sponsorship

The superheaters on the SP&S 700 are old, worn out by the caustic environment and the constant temperature swings within the flue tubes, and they need to be replaced. You can help keep the "First Lady of the Northwest" in service for many years to come by sponsoring one or more of her new superheaters. A donation of $300 will sponsor one superheater. All donations will be used for the inspection and rebuild of the SP&S 700, and as always all donations are 100% tax deductible.

Instructions:

  1. Select the superheater number(s) you'd like to sponsor by looking at the tube sheet diagram at left and checking the list of sponsors below to find available units.
  2. To pay online with a credit card, debit card, or PayPal account, first click the big red button below, which opens up PayPal on a new tab.
    Next enter the amount you'd like to donate ($300 per superheater). Now log in to PayPal (or near where it says "Don't have a PayPal account?" on the lower right click the "Continue" link and enter all your information). Then on the review your donation screen, find the text that says "Unit# and Name to Display on Website," click it, and in the box that appears enter the superheater number(s) you'd like to sponsor and the name(s) you'd like to have appear in the donor list below .
  3. You can also save us PayPal's 2.2% service charges by sending in a check. Just print out this form, fill it out, and mail it in along with your check. It may be old school technology, but like the 700, it works better than some of the new ways!
Superheater Sponsors
  1. Chris B McLarney
  2. George and Leia Landrock
  3. Bob McCoy
  4. John Meyer
  5. Jim and Alyce Abney
  6. Angelo Figone
  7. Kerrigan and Kyrian Gray
  8. Daniel & Cynthia Sandor
  9. Jim Betz
  10. Scott Thompson
  11. Bruce Sherman
  12. Robert Ferguson
  13. Bruce Sherman
  14. Daniel Quiat
  15. Bruce Sherman
  16. Daniel Quiat
  17. John M. Fujii
  18. Harry Hendricks
  19. Daniel Quiat
  20. Ethan Morel
  21. Daniel Quiat
  22. Rennsport Systems
  23. Al Baker
  24. Al Baker
  25. Al Baker
  26. Al Baker
  27. Felix J and Glenda McLarney
  28. Daniel Quiat
  29. Abby & Bella Monical
  30. --Reserved--
  31. Judson Parsons
  32. Terry Thompson
  33. Ethan Morel
  34. available
  35. available
  36. available
  37. available
  38. available
  39. available
  40. available
  41. available
  42. available
  43. John M. Harper Family
  44. Ken Vannice
  45. available
  46. available
  47. H.L. Martin
  48. available
  49. available
  50. available
  51. In memory - Engineer Rudy Wachter
  52. available
  53. available
  54. available
  55. available
  56. available
  57. available
  58. Paul L. Baldassare Family
  59. available
  60. available
  61. In memory - Steve Borstad
  62. Robert Ferguson
  1. Larry & Verona Jacobson
  2. available
  3. available
  4. Kingman Railroad Museum
  5. available
  6. available
  7. available
  8. Randal O'Toole
  9. available
  10. available
  11. available
  12. Art & Pam Burkhalter
  13. available
  14. Terry and Patsy Kimzey
  15. James J. Felts
  16. available
  17. available
  18. available
  19. available
  20. Kelly McLarney
  21. Charles Harrison
  22. Miles and Desiree McLarney
  23. available
  24. Felix B. and Dorothy McLarney
  25. available
  26. Pat and Kay McLarney
  27. Harlan and Melia Hoult
  28. Maureen and Molly McLarney
  29. available
  30. Susan Boos
  31. Arnie Holden
  32. available
  33. Barry and Carol Robertson
  34. Barry and Carol Robertson
  35. Barry and Carol Robertson
  36. Barry and Carol Robertson
  37. Barry and Carol Robertson
  38. Steve Sedaker honoring Anushka and Jeremy Klitzke
  39. Marlin Diehl
  40. available
  41. available
  42. available
  43. Greg Kamholz
  44. available
  45. available
  46. available
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  48. available
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  60. available
  61. available
  62. available
  1. available
  2. available
  3. Jim and Linda Vanderbeck
  4. available
  5. available
  6. available
  7. available
  8. available
  9. available
  10. available
  11. available
  12. available
  13. available
  14. available
  15. available
  16. Mark Siegel
  17. available
  18. available
  19. available
  20. available
  21. available
  22. available
  23. available
  24. Bill Hamby
  25. Bill Hamby
  26. available
  27. Willow Creek Railroad Museum
  28. Mark Siegel and Patricia Casey
  29. Garry Johnson
  30. Mark Siegel and Patricia Casey
  31. Garry Johnson
  32. available
  33. Garry Johnson
  34. available
  35. Garry Johnson
  36. available
  37. available
  38. available
  39. available
  40. available
  41. available
  42. available
  43. available
  44. available
  45. available
  46. available
  47. Jeremy Klitzke & Anushka Shenoy
  48. Jeremy Klitzke
  49. Jeremy Klitzke & Anushka Shenoy
  50. Don Matlock
  51. available
  52. available
  53. available
  54. Jay Simpins
  55. available
  56. In memory of Bill Williams
  57. available
  58. available
  59. available
  60. available
  61. available
  62. Doug Bassett