Belgian State Railways Type 6

The Belgian State Railways Type 6 was a class of steam locomotives for express passenger service on steep inclines, introduced in 1885.

They were superseded in 1897 by the similar but larger Type 16 Moguls, with twelve Type 6 receiving the improved Type 16 boiler that year. Owing to the deficiencies of the Belpaire firebox with a shallow grate, seven received new boilers with deep and narrow fireboxes, being reclassified as Type 6bis.

Construction history
The locomotives were built by various manufacturers from 1885 to 1894. The machines had an outside frame and inside cylinders and a Walschaert valve gear.