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Key Facts Summary

Boiler, Engines and Pumps – key data

No.1 (Boulton & Watt)

No.2 (Harvey)

Engines

Bore

107 cm / 42 inches

107 cm / 42 inches

Stroke

2.1 m / 7 ft.

2.3 m / 7 ft 8”

Strokes/minute

11

10

Cylinder capacity

1900 litres / 67 cu ft

2180 litres / 77 cu ft

Steam pressure

1.4 bar / 20 p.s.i.

1.4 bar / 20 p.s.i.

Vacuum

0.9 bar / 26 inches Hg

0.9 bar / 26 inches Hg

Beam weight

6 tonnes

4.5 tonnes

Date built

1812

1846 (rebuilt 1903)

Cost at the time

£2,244

£1,636

Pumps

Bore

76 cm / 30 inches

76 cm / 30 inches

Stroke

2.4 m / 8 ft.

2.4 m / 8 ft.

Lift

12 m / 40 ft.

12 m / 40 ft.

Type

lift

force

Water volume per stroke

1100 litres / 245 gall / 1.1 tonnes

1100 litres / 245 gall / 1.1 tonnes

 

Boiler, Engines and Pumps – A brief history

 

 

 

Date

Event

1809

36” Boulton and Watt engine installed with wooden beam. Replaced in 1846

1810

Kennet & Avon Canal opened

1812

Current 42” (later to become No.1) Boulton & Watt engine installed

1836

Wilton Water formed to provide main source of fresh water for the pumping station

1843

Two new Cornish boilers installed to replace three ageing Waggon boilers

1845

No 1 engine converted to Cornish steam cycle 

1846

36” Boulton  & Watt engine replaced with Sims compound engine (now known as No.2 Engine)

1859

Brick chimney built

1906

Two Lancashire boilers in place

1908

The No.2 Sims engine converted to Cornish cycle by Harvey & Co. of Hayle

1959

Chimney failure and engines unable to run

1968

Kennet & Avon Canal Trust bought Crofton from British Waterways for £75

1971

Both engines restored and steamed

1987

Current Lancashire boiler installed

 

 

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