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A feature of the Fron-Boeth mill is a large Lancashire boiler, which must have been conveyed to site via the Pant Mawr tramway, as it is too large to fit through the tunnel. There is a slate lined channel beside the single acting table incline, indicating that it may have been a water balance.
A single operable Lancashire boiler provides steam to the engines. [ 2 ] Number 1 engine , built by Boulton and Watt in 1812 and rebuilt as a Cornish engine in the 1840s, is a single-acting, condensing engine with a bore of 42.25 inches (1,073 mm), a stroke of 7 feet (2,100 mm) and indicated power of 38.6 kW (51.8 hp).
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Steam for the pumping engines and auxiliary engines is raised in five Lancashire boilers, with the first set of boilers being made by Robert Stephenson and co. In normal operation only two out of the five boilers would be in steam with one on hot reserve and the other two having maintenance work. The boilers were on an 8 weekly rotation.
An electric power generating house was built in 1915 and a tall chimney for the boiler plant built in 1916. The Lancashire boilers were supplied by Galloways . In 1923 the Mosley Common, Nos 1, 2 and 5 pits employed 1,338 underground and 198 surface workers while Nos 3 and 4 pits employed 951 underground and 143 above ground. [ 5 ]
The large Lancashire boiler is kept full of water from the roof gutters, and is used in the condenser (under the engine) and as feed water for the Cornish boiler. As originally built, the weaving shed was about 250 feet (76 m) by 200 feet (61 m), set into the hillside with typical north facing roof lights to provide natural light, it housed ...
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A shell or flued boiler is an early and relatively simple form of boiler used to make steam, usually for the purpose of driving a steam engine. The design marked a transitional stage in boiler development, between the early haystack boilers and the later multi-tube fire-tube boilers .