Ok, since I have 5 min for the sake of argument.
For the sake of argument, I hope you don't believe everything you said in your post.
I do in fact believe everything I said in my post.
You said, [ block the p port ] You do not ever block the P port using an OC hyd system.
Just as I said: "Blocking p will load the pump until the relief kicks in as well as blocking flow to downstream valves i.e. 3pt hitch, so they should not be used in this application."
The T port is not really a tank port unless the valve assembly is used as the last valve in the system before the tank.
It is also not necessarily a PB port .
When the the solenoid assembly including subplate is in neutral, whether it is a cyl valve or a motor valve, the fluid is flowing from P to T. Most definitely a PB port of at least 3000 psi.
Many solenoid valves have a T port that in fact is NOT rated for full system pressure
You do not stop the flow in an open center hyd system, as the fluid is moving all the time either going to a hyd component or flowing to the next valve.
Agreed!
PB is just the ability to handle high pressure.
I think we disagree on the definition of Power Beyond. So be it.
There is not a significant pressure loss by connecting valves in series. It is done all the time.
There is always some pressure and flow loss with anything added to an open hydraulic system because everything is in series. This includes hoses/fittings/valves/etc. Hydraulic pumps are generally sized for the required gpm and pressure to the last valve in the system after accounting for all losses, and therefore adding something in between will in some way reduce the supply downstream. Granted that most systems can probably handle some additions, as they may not be "significant," but I would encourage folks to do the research before adding to the factory hydraulic system on a CUT. Especially with multiple solenoid valves as they can vary greatly in their gpm and pressure capability.
When the valve is activated, fluid is redirected to the A and B ports, the used fluid is flowing out through the T port. Same goes for the hyd motor, as you push fluid through the IN port of the hyd motor, the motor is expelling fluid through the T port. This fluid is going to the next valve.
Agreed. And now this fluid is "used" and in fact is not Power Beyond.
A lever hyd valve has a dedicated low pressure port for the expended fluid. T port..
True for most, but not all.
If you still think I am wrong, then so be it.
Honestly, Its not that I'm trying to prove you wrong, but some of your points can be misleading. For example your advice to Kevincook, to "Just go to Surplus and choose your valves, and a sub plate that will accommodate the number of valves you want." This could lead someone to purchase a parallel multiple valve sub plate with open center valves and motor spool valves. When in fact he would need a series sub plate with tandem center valves to accomplish his goals.
I encourage anyone attempting to DIY additional hydraulics on their CUT's to do plenty of research and if need be seek the advice of a professional hydraulic shop or even your local tractor dealer before starting. My local shop was very helpful in guiding my decision to add a single Electric over Hydraulic valve on my tractor.
Good day,
