The South African Railways Class MA 2-6-6-0 of 1909 was a steam locomotive from the pre-Union era in the Natal Colony.
NGR Mallet no. 336, SAR Class MA no. 1601, c. 1909
Piston valve (steam engine)
Videos
Piston valves are one form of valve used to control the flow of steam within a steam engine or locomotive. They control the admission of steam into the cylinders and its subsequent exhausting, enablin
South African Class MA 2-6-6-0
…internal diameter, with flexible connections leading into the smokebox. The high-pressure cylinders were fitted with 10 inches (254 millimetres) diameter piston valves and had a bore of 17+1⁄2 inches (444 millimetres), while the low-pressure cylinders were fitted with Richardson balanced slide valves and had a bore…
Diagram of cylinder and piston valve. The valve is next opened by moving it to the right, allowing the clear space in the middle of the valve to align with the channel in the cylinder above it.
The Swannington incline winding engine of 1833 incorporated a piston valve