Kew Bridge Museum 90 Inch beam engine valve gear

This is the Kew Bridge 90 inch engine (I believe it’s the World’s largest working beam engine), the Valve gear controls the progress of steam through inlet, equilibrium, and exhaust / condenser. The adjustment that you see being made is to vary the amount of steam that’s admitted; this is necessary to control the length of the piston stroke as there is no other limit, these engines could run wild and demolish the building if left!

Post time: Apr-11-2016