Clark Railworks have announced their entrance into the world of TT:120 Scale modelling with this all-new model of the 'PRESFLO' cement wagon in this scale, available for the first time ever. 

A selection of single vehicles and triple packs are to be produced catering for the most popular variations in BR bauxite and Blue Circle Cement colour schemes.As with Clark Railworks' larger scale models these are set to feature all the usual bells and whistles including exquisite accurate detailing, 'Ultraflex' bufferbeam pipes, brass buffers and a heavy robust chassis. 

We expect these to arrive during Spring 2027 - pre-order yours now!

Presflo and Prestwin were the designation for two types of goods wagon designed by British Railways in the 1950s for the carriage of powdered goods. The Presflo design was specifically for carriage of powdered cement but wagons to this design were subsequently used to transport other powdered commodities. The later Prestwin wagons were designed to overcome problems encountered with using the Presflo design for certain powdered commodities. Both types of wagon were loaded by gravity but unloaded using compressed air.

While the Ideal Stock Committee reviewed the existing wagon designs inherited by British Railways and recommended which pre-nationalisation designs should either be continued or developed, there were also occasions where a need was identified that could not be met by an existing wagon designs such as the need for the bulk transport of cement powder, a commodity that had previously been carried bagged in vans.

Presflo is short for Pressure flow, and the designation came about as the design of wagon features air fluidisation, a system that pumps air into the powder under pressure to loosen it and prevent clumping, thus allowing the powder to be drained from the wagon efficiently. The distinctive external ribs were designed to strengthen the wagon to prevent it collapsing when unloading. The wagon itself was 16 feet 6 inches (5.03 m) over headstocks on a 10 feet 6 inches (3.20 m) wheelbase chassis. The wagon was not symmetrical, with both the access ladder and the discharge pipe only at one end. The total capacity of powder was 611 cubic feet (17,300 L).

BR operation of Presflo wagons ceased in 1987.