The station contains the four original pumping engines, which are thought to be the largest remaining rotative beam engines in the world, with 52-ton flywheels and 47-ton beams. Although the engines are original, they are not in their original 1864 configuration, as all four were converted from single-cylinder to triple-expansion operation in 1901 and 1902. Prince Consort was returned to steam in 2003 and now runs on Trust Open Days. The other engines are not in working order, although work has begun on the restoration of Victoria.