I installed the valve today, it was a total mess on the inside. There was a layer of rust coating the inside of the valve body which just should not happen. The entire thing is made from stainless. It must have been from whatever was being pumped in the system. I disassembled everything and scrubbed it down with scotchbrite and it cleaned up pretty well. I do need to get a new bearings for the gate, they are in pretty sad shape.

I borrowed a hydraulic motorcycle jack to lift the valve in place. Worked rather well. I did have to turn the other gate valve 90 degrees to clear the big valve's mechanism.

Tomorrow I need to run down and pick up some longer bolts. The one I have were just barely long enough to reach. I also need to tie the valve into the frame of the system, there is going to be significantly more weight hanging off there than what was there in the past.