We created a new design for steam locomotive valve gears which - in our opinion - is clearly superior to Walschaerts valve gear, both concerning maintenance requirements and also in the symmetry of valve events. It gives good diagram results even for large valve piston travel and avoids the disadvantages of open loops like with Walschaerts valve gear by omitting them.
All bearings are closed rotating bearings. The structure of the parts involved ideally is similar to the parts of Baker valve gear. The kinematical structure is similar to Walschaerts valve gear.

For more explanations and a running and reversible demo valve gear, visit https://steamtec.s-a-s.ch/?box=yk3a and contact us if interested.

For a first implementation customer, we are open to give extensive support.