4th Panel


“The System of Vaso R (the R Duct)” is clearly visible from above: the duct runs from above and branches off into a second adduction pipe, whose first tract is made up of “gardna|l” heap of stones and then close to the forge, where it runs suspended, it is made up of chestnut wood. The Vaso R (the R Duct) continues running on the ground, where the drain is made up of heap of stones.
There can be observed the dual typology:
the main duct is made up of masonry with squared heap of stones;
the first tract used for diverting the water “gardena|l” is still in heap of stones;
the adduction pipe is made up of wood because it has to reach a high altitude for bringing the water that should fall to make the wheels and the “tina de l'ra” work;
on the ground the drain is in heap of stones and consents the reconnection to the main duct.
The adduction pipe was rebuilt during the renovation works of 2004 in chestnut wood, repositioning the piles that support the structure, where has been placed the mortise axis that form the real duct. At the beginning of the wooden duct is inserted the “rstlt” placed upright, which is in other words the grid that consents to stop the floating material on the water. The diversion of the water occurs at the high part through a system of guillotine sluice, which allows the water to flow or stops it. The “tina de l’ra” is a device that consents to send a constant jet of air to the furnace in order to help the combustion: the water of the duct is carried in a vertical pipe, with square or circular section containing small cracks, that ends with a cylinder closed as a barrel, the “tina de l'ra”. This was done in wood or stone and subsequently in cement and it includes a granite block, on which the water falls so as to create a flow of compressed air, that is conveyed through a metal pipe, the “can de l'ra”, near the internal part of the furnance. In this manner, the water is transformed into air for the inflation of the furnance by using a device introduced in the second half of the seventeenth century, for replacing the wooden and leather bellows. This is an idroeolian pump, that is to say a device that consents to produce compressed air continuously.