Here they are finished, complete with hand-wheel. Those are toothpicks they are mounted on for painting .. which gives you a good idea of their size. Not satisfied with that I had to add the ubiquitous penny for the photo .. just in case the toothpicks were not good enough.
Note that the gate valve on the far left is open while the other two are closed. The open valve will connecting to the piping that runs to the water tank on the On18 level. The two closed valves will run directly to the coke ovens and to the line running to the outside and back into the river.