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No.1 (Boulton & Watt) |
No.2 (Harvey) |
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Engines |
Bore |
107 cm / 42 inches |
107 cm / 42 inches |
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Stroke |
2.1 m / 7 ft. |
2.3 m / 7 ft 8” |
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Strokes/minute |
11 |
10 |
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Cylinder capacity |
1900 litres / 67 cu ft |
2180 litres / 77 cu ft |
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Steam pressure |
1.4 bar / 20 p.s.i. |
1.4 bar / 20 p.s.i. |
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Vacuum |
0.9 bar / 26 inches Hg |
0.9 bar / 26 inches Hg |
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Beam weight |
6 tonnes |
4.5 tonnes |
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Date built |
1812 |
1846 (rebuilt 1903) |
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Cost at the time |
£2,244 |
£1,636 |
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Pumps |
Bore |
76 cm / 30 inches |
76 cm / 30 inches |
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Stroke |
2.4 m / 8 ft. |
2.4 m / 8 ft. |
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Lift |
12 m / 40 ft. |
12 m / 40 ft. |
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Type |
lift |
force |
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Water volume per stroke |
1100 litres / 245 gall / 1.1 tonnes |
1100 litres / 245 gall / 1.1 tonnes |
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Date |
Event |
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1809 |
36” Boulton and Watt engine installed with wooden beam. Replaced in 1846 |
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1810 |
Kennet & Avon Canal opened |
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1812 |
Current 42” (later to become No.1) Boulton & Watt engine installed |
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1836 |
Wilton Water formed to provide main source of fresh water for the pumping station |
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1843 |
Two new Cornish boilers installed to replace three ageing Waggon boilers |
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1845 |
No 1 engine converted to Cornish steam cycle |
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1846 |
36” Boulton & Watt engine replaced with Sims compound engine (now known as No.2 Engine) |
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1859 |
Brick chimney built |
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1906 |
Two Lancashire boilers in place |
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1908 |
The No.2 Sims engine converted to Cornish cycle by Harvey & Co. of Hayle |
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1959 |
Chimney failure and engines unable to run |
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1968 |
Kennet & Avon Canal Trust bought Crofton from British Waterways for £75 |
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1971 |
Both engines restored and steamed |
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1987 |
Current Lancashire boiler installed |