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South Pacific Tyres; John Thompson boiler demolition 1; burner end
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Details
PhotographerBill Prebble
DescriptionThis boiler was made by a John Thompson subsidiary in Hamilton; it was rated at 35 000 pounds/16 000 kg per hour from and at 100 degrees C; noticeably less at its working pressure of 250 pounds per square inch (17 bars).
The burner could use natural gas or oil, and has been swung outwards. At bottom right is the blower which fed air to the burner.
Originally, the outside chimney was 1.8 metres bore, but in 1972-73 the bore was reduced to 0.9 metres; the gas would move four times as fast, and hopefully it would send any smoke up through the atmospheric inversion layer; friction per foot would be five times what it had been, so a fan was necessary.
There are six panels, each with two handles, which can be removed to allow the flue-gas tubes to be cleaned.
These eight images have been selected from 20 taken as the boiler was carved up; they show the main details and how the boiler worked.Date TakenNovember 2007
DescriptionThis boiler was made by a John Thompson subsidiary in Hamilton; it was rated at 35 000 pounds/16 000 kg per hour from and at 100 degrees C; noticeably less at its working pressure of 250 pounds per square inch (17 bars). The burner could use natural gas or oil, and has been swung outwards. At bottom right is the blower which fed air to the burner.
Originally, the outside chimney was 1.8 metres bore, but in 1972-73 the bore was reduced to 0.9 metres; the gas would move four times as fast, and hopefully it would send any smoke up through the atmospheric inversion layer; friction per foot would be five times what it had been, so a fan was necessary.
There are six panels, each with two handles, which can be removed to allow the flue-gas tubes to be cleaned.
These eight images have been selected from 20 taken as the boiler was carved up; they show the main details and how the boiler worked.
Date TakenNovember 2007 Depicts or relates to
Part of
CollectionDunlop Prebble
About the original
ReferencePrebble 21FormatColour printSize100 x 150 mm
FormatColour printSize100 x 150 mmScanned byDon McLeod
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South Pacific Tyres; John Thompson boiler demolition 1; burner end. Upper Hutt City Library, accessed 19/03/2026, https://uhcl.recollect.co.nz/nodes/view/30442