Thanks guys, I've got something to go on now and can continue from here.
For the curious; the water is clean and is cycled around the system. The valves are steel, and are left open until they are needed to close for maintenance.
cheers,
G
My team has been tasked to look into a maintenance program for a computer center water cooling pump system (water -> valve1 -> centrifugal pump -> valve2 -> cooling system).
The system has two rising stem type gate valves and I need to be able to detail common failure modes and how these will...
