Well Scott, the valve has no info that I can see. It has a plate on top that describes operation, but there is nothing to ID the manufacturer nor any identifying number. I suppose the info could be hidden or on the bottom side of the valve, but I just don't want to disassemble the splitter to try and find the data.
BTW: I hooked up the splitter in reverse the first time I plugged it into my remotes because the remotes can be swapped by action of the remote lever. The log splitter worked just fine, but opposite the shown direction of its lever. This is again slightly different from what you are asking because you plan to have the valve under pressure when it is in the neutral position. It could cause the lever to be very hard to operate or not operate at all due to the pressure creating a hydraulic lock; not likely, but possible. That would occur only if you were operating the 3PH under load and tried to operate the log splitter. If you tried to operate the log splitter and the 3PH position control was not nulled, the logsplitter would not operate well because the return side was under pressure from the 3PH. That's not the preferred setup in my estimation.