Same problem, could not find a Valve which allows preassure at the output!
You are talking about „reaction“ orbitrol, this is a problem also at closed center .........
Isn't the purpose of those valves to control hydraulic flow and pressure to cylinders? I don't quite understand why the pressure should be limiter in the output. But I don't have much knowledge about hydraulic systems.
For now, it seems that there are four types of steering, and we should think about proper connecting of AOG into those types:
1) Open Center - Non-reaction
2) Open Center - Reaction
3) Close Center Load Sensing - Non-reaction
4) Close Center Load Sensing - Reaction
In both my tractors I have Non-reaction steering (as my steering wheel doesn't move intil I touch it), and I thought taht Reaction types are used only in Automobiles. As the biggest difference should be that Reaction steering needs to have the same flow to each wheel, so there should be two cylinders connected as a parrallel pair (or maybe one cylinder with rod on both sides). Is that right?
Brian, this topic is wide, and I believe that it should have a separate thread in this forum, so we could discuss only hydraulic steering. Should we start a new topic and is it possible to copy some of the posts there?